MEDICAL FAILURE PATTERN SEARCH ENGINE
A patient safety search engine and alarm processor is programmed to repetitively search the electronic medical records of all patients in a hospital system to automatically provide early detection of patients with evolving pathophysiologic cascades, and in particular the cascades of evolving death, such as cascades of septic shock. The search engine also searches for a wide range of evolving pathophysiologic failures which are commonly fatal if detected too late. An alarm processor is provided which is programmed to provide an alarm upon the detection of a cascade or failure. The processor is further be programmed to provide an image of the cascade, and to determine, the severity of the cascade, and the time of onset of the cascade in relation to the timing and type of procedures and treatment and the increased cost associated with the cascade. Discretionary real-time system-wide searches for a wide range of clinical failure patterns or images within the hospital system may be performed using the disclosed patient safety search engine.
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This application claims priority to U.S. Provisional Application No. 61/126,906, filed May 8, 2008 and to U.S. Provisional Application No. 61/200,162, filed Nov. 25, 2008, the disclosures of which are hereby incorporated by reference in their entirety for all purposes. This application is related to co-filed US patent application titled “Patient Safety Processor” the disclosure of which is hereby incorporated by reference in its entirety for all purposes.
BACKGROUNDThe present disclosure relates systems and methods for detecting and monitoring patient conditions in clinical medicine settings.
Patients die unexpectedly on hospital wards under the careful watch of even knowledgeable and diligent healthcare workers at alarming rates. It has been argued that hospitals have a culture of failure tolerance. However, a more critical analysis reveals that this “tolerance” is actually resignation and that the high number of clinical failures comprises the unavoidable result of the ill-conceived attempt to manage the profound complexity of overlapping human pathophysiology without adequate technology. Unfortunately hundreds of common but subtle perturbations which combine to produce complex pathophysiologic failure cascades which progress to death can potentially occur with every patient in the hospital.
While the physiologic complexity of just one patient is often overwhelming, a single nurse may have twelve complex patients and a single hospitalist physician may have 30. In the present state of hospitals, most of the physiologic complexity resides in the electronic medical records (EMR) even as the patient progresses toward death. Unless an expert physician or nurse puts all the pieces together timely to see the evolving failure, the patient is often doomed even though healthcare workers are nearby.
Patient care in a hospital setting involves a complex management process because human pathophysiology is highly complex and healthcare workers address multiple patient issues simultaneously. Decisions about patient priority and care made by the healthcare workers are subjective to some degree and may vary depending on the level of expertise and experience of each person involved in patient care.
Because of the complexity involved in patient care, particularly in a hospital setting, healthcare workers have attempted to provide a level of uniformity to the process through protocol-based care. Such care may involve “if X-threshold-breach then Y-action” branching decision tree protocols. However, such protocols when considered in relation to the true level of pathophysiologic complexity often comprise a profound over simplification so that the healthcare worker can easily proceed down the wrong branch of a decision tree.
In addition to protocol-based care, healthcare workers often monitor various physiological parameters of a patient in order to obtain more information upon which they may base clinical care decisions. Many of these parameters may include blood oxygen levels, pulse rate, routine blood tests and vital sign tests, which may be recorded in a centralized electronic medical record. However, this testing may not be effective in the early detection of certain clinical conditions or in providing the healthcare worker with a clear picture of the patient's condition and care. Even subtle and minor levels of perturbation may lead to profound instability in certain clinical situations. For example, minor changes in the serum sodium in the setting of a stroke may lead to confusion and then obtundation, which may increase the risk of aspiration, pneumonia, and venous thrombosis. Indeed, the level of serum sodium decrement to produce such abnormalities may be as little as 8 mEq, a decrement which would otherwise not be likely to produce an adverse reaction in the absence of an acute stroke. Since an 8 mEq decline in serum sodium would normally be tolerated in the absence of a stroke, it may be easily overlooked as a cause of profound instability by a healthcare worker who may not be knowledgeable or diligent enough to recognize the entire relational complexity. It is very common that subtle or simple events or occurrences actually comprise linked components of a much larger, dangerous, but undetected expanding pathophysiologic failure process. Since simple pertubations are readily overlooked by the physician (or if they are identified, the pivotal linkage to other processes is commonly unrecognized), this allows the pathophysiologic failure process to progress, untreated toward death.
In another example of the challenges involved in the timely detection of evolving complex patient conditions, septic shock is often the end result of progression from the uncomplicated state of infection to progressive states of the inflammatory response syndrome, sepsis, severe sepsis, and finally septic shock. These distinctions of states are arbitrary and poorly defined at the bedside. The vast majority of patients have infection with fever without further progression and many even progresses to the inflammatory response syndrome without further progression to septic shock. Because routine blood testing and even continuous vital measurements may not always detect the pre-shock state, specialized blood tests and biomarker profiles specifically developed to detect the pre-septic shock state have been developed. However, specific blood test and profiles suffer from a lack of specificity, in part because the variable response of patients to physiologic perturbation. Whether or not a given patient progresses to shock depends on much more than the biomarkers present and their concentrations. Progression to shock may depend on a complex relationship of patient-specific physiologic responses to immunologic and inflammatory perturbation as well as the physiologic state of the patient at the onset and during the perturbation and the timeliness and adequacy of intervention (e.g. antibiotics and/or fluid). Since most of these factors are not captured by blood test measurements or biomarker profiles, even serial testing directed specifically toward the detection of the pre-shock state may not provide sufficient information to provide for reliable timely detection of the evolving state of severe sepsis or septic shock.
Advantages of the present disclosure may become apparent upon reading the following detailed description and upon reference to the drawings in which:
One or more specific embodiments of the present disclosure will be described below. In an effort to provide a concise description of these embodiments, not all features of an actual implementation are described in the specification. It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another. Moreover, it should be appreciated that such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.
The present disclosure provides systems and methods for diagnosis, monitoring, and treatment of certain clinical conditions.
One embodiment comprises a processor system including an electronic medical records database of a hospital or hospital system containing at least laboratory and physiologic data of at least one patient, a search engine programmed to automatically and repetitively search data within or derived from the database to detect complex patterns or images of evolving pathophysiologic cascades, and to further define the cascade, quantify the cascade, and to determine the relationships and cost of the cascade. According to one aspect of the invention a pathophysiologic cascade as detected by one embodiment comprises an expanding pathophysiologic process. Such expansion commonly occurs within the initially affected system as for example in the immune system (as an inflammation cascade) and then expands into other systems such as the respiratory and cardiovascular system often through chemical, neurological, and/or anatomical mechanisms of augmentation, up regulation, down regulation, compensation, compensation failure, and combined systems failure. The most important cascades detected by an embodiment of the present invention are cascades of evolving death (CED).
One embodiment comprises a search engine which automatically, intermittently and/or continuously searches for and detects pathophysiologic cascades and particularly cascades of evolving death (CED), and an alarm processor programmed to identify the patient which is generating the CED and to provide an alarm upon the detection of such a cascade at a site adjacent the location of the patient, to a care giver managing the patient, to a ward in which the patient resides, to a quality control center or patient safety management center, to the patient him or herself as by a pager or phone which may be configured to display an image of the cascade, the type of the cascade, and/or at least one characteristic of the cascade. The pager may generate a series of lights which are indicative of the severity of the failure and/or cascade detected. The wearing of the pager by the patient prevents the healthcare worker from discounting or ignoring the findings since the patient him or herself (or the patients family if the patient is not competent) is also notified by the processor.
According to one aspect of the present invention, cascades of evolving death (CED) are detected by the search engine as expanding aggregations of perturbations and variations of signals and/or tests derived from a biologic organism which spreads across signal and tests derived from different systems within the organism and commonly ends in death. Commonly, as the CED evolves, the number of perturbations, the number of different types of positive or negative trends or variations, and/or the number of different types of threshold breaches, and the number of perturbed systems, progressively rise.
One pathophysiologic process which commonly generates a widely expanded CED is severe sepsis. Severe sepsis commonly induces microcirculatory failure which eventually expands the CED across all systems dependent on microcirculation. In the lungs, evolving microcirculatory failure causes a progressive decline in the efficiency of gas exchange, minute ventilation rises to compensate or as a direct result of the factors (such as toxins) which are associated with the cause of the process. With many systems the response is biphasic, with an initial augmentation perturbation (with comprises a favorable or preparatory response of the system. As the cascade progresses, subsequent to augmentation, failure related perturbations develop expansively. In the sepsis CED example, metabolic system perturbation may initially be an augmentation perturbation comprising a simple preparatory fall in hydrogen ion, but later as the cascade evolves widespread failure related perturbations dominate.
Cascade of evolving death commonly contain smaller relational patterns which may progress virtually throughout the cascade and by themselves may portend death. For example the CED of severe sepsis contains the pattern of pathophysiologic divergence of ventilation and arterial oxygen saturation which is described in U.S. patent Ser. No. 10/150842 (the disclosure of which is incorporated by reference as if completely disclosed herein). Despite the fact that such smaller relational patterns may progress virtually throughout the CED (and by themselves may portend death) these small patterns generally represent only a very small portion of the signal “bandwidth” of the death cascade, especially as the cascade matures and becomes widely expanded. The smaller relational patterns therefore are useful for detection of the likely presence of a CED but do not provide the specificity to determine the cause of the CED and may not be, especially early in their manifestation, specific for the presence of a CED.
Typical CED have at least one initiating apex or vertex which comprises the onset of the cascade. The apex or vertex is generally within a single physiologic system. The CED expands out from the apex or vertex across the initially affected system and/or into and across other systems. It is common for CED to expand within the initial system first. Like a progressively enlarging cone of perturbation projecting initially within and then beyond the initial system, the CED may expand to involve virtually all systems by the time the point of death is reached.
Cascades of evolving death, in 3D space can be represented by a cone with apex comprising the onset of the cascade, the length of the cone being defined by cascade duration, the angle of the come being defined by cascade expansion rate, and the cross-sectional area at a given point being defined by the magnitude of the cascade expansion at that point in time.
When, according to one embodiment of the present invention, the data sets are organized into a 2D format (such as a time series matrix which is compartmentalized such that each system defines a separate compartment of time series) the CED commonly produces a triangle with the angle at the vertex defining, in part, the speed of expansion of the CED. The CED, without intervention, will commonly end in death. In the 2D representation a death vertex is identified on the X axis and the triangle can be competed by passing a line vertically through all perturtubations or variations which remain at the time of death. This forms the base of the triangle of the CED.
If the patient achieves spontaneous or assisted recovery the cascade begins to contract. The point at which contraction begins forms the vertex and base of the cascade expansion triangle of the CED and the vertex and base of contraction triangle of the CED which eventually contracts to a stable state vertex point at the end of the contraction triangle. Even after a patient has recovered, the state of the physiologic components of the time series matrix of the stable state after the CED may be different from that which preceded the CED and this difference and its location in relation to systems and time series types is often a quantifiable indication of the extent and type of residual injury sustained by the patient due to the event which induced the CED, the CED itself, and/or due to treatment.
While the term cone and triangle is used herein for graphical representation of the expanding cascade, a preformatted matrix will be affected in a wide range of expanding patterns. Expansion may not be uniform or linear but rather the shape of the expanding cascade varies depending on a wide range of factors as will be discussed.
The processor may further be programmed to determine at least one of the type of cascade, the severity of the cascade, the duration of the cascade, the time of onset of the cascade, the maturity (as for example the stage) of the cascade. The severity may be determined by the number of perturbations or trends which comprise the cascade, the severity of the pertubations or trends (as for example by the slope and/or magnitude of the perturbations or trends which comprise the cascade in relation to the baseline values and/or statistical normal values by another severity measure), the number of systems affected by the cascade, the presence, number and /or severity of failure of compensation in response to perturbations associated with the cascade, the growth of the cascade, as for example by the number of new perturbations being added per unit time or the number of systems affected. The processor may also detect the events or components associated with or which are a part of the cascade. The alarm processor may be programmed to provide an indication of each of the forgoing. Alarm display may be provided for presenting any of the forgoing in textual, auditory, graphical, or other formats. The search may be reinitiated each time new data is added, each time a particular type of data is added, or at a preselected or adaptive frequency. For example the searching frequency may increase when early components of a possible cascade have been identified or when an actual cascade has been identified.
One embodiment retains the images and relationships detected during the previous search(s) so that the subsequent new search cycle of the data set is less processor intense involving, for example, only the comparison of the new data (with or without prior formatting) to the previous processed data sets to determine if a new cascade is developing, an existing cascade is becoming more severe or improving, or if another event in relation to a cascade (such as a treatment event) has occurred.
One embodiment comprises a patient data processing system for converting the global electronic medial record (EMR) of a patient or patients into a real-time patient monitor comprising a pathophysiologic cascade search engine configured to repetitively and/or continuously search the EMR for evolving complex pathophysiologic cascades and an alarm processor for outputting a warning upon detection of a cascade. The pathophysiologic failure cascade search engine may be programmed to continuously search the EMR for evolving complex images of physiologic failure such, for example a sepsis cascade, the alarm processor may be programmed to provide an alarm upon detection of the pathophysiologic failure cascade, and the image processor programmed to output an image of the evolving failure cascade. The data processing system may also be programmed to quantify the cascade, track the progression of the cascade, identify, highlight and/or alarm associated events in relation to the cascade, determine the cost associated with the cascade, determine the timing of treatment in relation to the cascade, and determine the response of the cascade in relation to treatment.
In another embodiment the processor is programmed to convert the electronic medical records into a particular format favorable for searching for pathophysiologic cascades. In one example such a format comprises sequential and timed trends comprised of at least positive trends and negative trends of both the physiologic parameters and the laboratory data, detect relational trends comprised of a combination of positive and/or negative trends, detect complex cascade patterns comprised of a plurality of combinations of relational trends, automatically output a display of the image of the detected complex cascade, automatically output a warning indicating the detection of the complex cascade, track the growth or decline of the complex cascade and output an indication indicative of growth or decline the cascade pattern may be indicative of a single or multiple physiologic failures such as at least one of sepsis, severe sepsis, septic shock, and microcirculatory failure, a shock cascade, and a septic shock cascade to name a few. The processor may be programmed to determine and output an indication of the type of the cascade detected, to determine and output at least an indication of the timing and type of the trends along the cascade, to determine and output at least an indication of the length of the cascade, to detect the onset of therapy and to determine and output at least an indication of timing of therapy in relation to the cascade. The patient data processing system may comprise a computer be programmed to search the EMR to detect sequential and timed trends comprised of at least positive and negative trends of both the physiologic parameters and the laboratory data, determine relational timing of the detected positive and negative trends, detect complex cascade patterns comprised of a plurality of combinations of positive and negative trends evolving in sequential timed relation to each other, and output an indication of the detected complex relational cascade pattern.
In another embodiment, the processing system may comprising a computer programmed to convert the electronic medical records into sequential and timed trends comprised of at least positive trends and negative trends of both the physiologic parameters and the laboratory data, detect relational trends comprised of a combination of positive and/or negative trends, detect complex cascade patterns comprised of a plurality of combinations of relational trends, output an alarm indicating the detection of the complex cascade pattern.
Another embodiment comprises a patient data processing system for processing electronic medical records of at least physiologic parameters and laboratory data of at least one patient comprising a computer programmed to identify positive and negative trends comprising at least a combination of inflammatory trends, metabolic trends, hemodynamic trends, hematologic trends, and respiratory trends, identify the relational timing of the positive and negative which relationally or collectively are indicative of the septic shock or pre-septic shock failure cascade, and identify and output an indication of the septic shock or pre-septic shock failure cascade. The may be further programmed to identify the onset of treatment, and identify the timing of treatment in relation to at least one component of the cascade and to analyze the relational pattern to identify the earliest trend comprising a component of the cascade, identify the onset of treatment, and identify the timing of treatment in relation to said earliest trend. In another embodiment for processing electronic medical records of at least physiologic parameters and laboratory data comprising a computer programmed to generate a large set of time-series of data of a patient including at least data relating to the physiologic state and/or care of a patient, convert the datasets, including at least the monitored datasets and laboratory datasets into parallel and overlapping time series, identify occurrences comprising at least, inflammatory occurrences, metabolic occurrences, volumetric occurrences, hemodynamic occurrences, therapy occurrences, hematologic occurrences, respiratory occurrences, identify the timing of the occurrences, identify at least one relational pattern of occurrences along a plurality of time series which is indicative of failure cascade of at least one of a sepsis cascade, a pulmonary embolism cascade, a metabolic cascade, and a microcirculatory failure cascade, output at least one of an indication of the cascade, the timing and type of the occurrences along the cascade, and length of the cascade. Another embodiment comprises a method for converting the global electronic medial record into a patient monitors the method the electronic medical record system having a display comprising steps of converting the electronic medical records into sequential and timed trends comprised of at least positive trends and negative trends of both the physiologic parameters and the laboratory data, detecting relational trends comprised of a combination of positive and/or negative trends, detecting complex cascade patterns comprised of a plurality of combinations of relational trends, outputting a display of the image of the detected complex cascade, outputting a warning indicating the detection of the complex cascade pattern, and tracking the growth or decline of the complex cascade and output an indication indicative of growth or decline.
In another embodiment the patient data processing system for processing electronic medical records of at least one patient comprising a computer programmed to convert at least the physiologic and laboratory data of the electronic medical records into a predetermined format for imaging, imaging the formatted electronic medical record, detect an image indicative of at least one of patient physiology and patient care, output an indication of the presence of physiologic failure. The computer may be further programmed to analyze the images to detect relational patterns of the detected physiologic failure to determine the severity of the physiologic failure and/or to detect relational patterns indicative of the patient response to the detected physiologic failure to determine the severity of the physiologic failure and/or to detect relational patterns indicative of patient care in response to the detected physiologic failure to determine at least one of the timeliness and efficacy of the care. The physiologic failure can for example be at least one of sepsis, severe sepsis, septic shock, a sepsis cascade, microcirculatory failure, a shock cascade, a septic shock cascade to name a few.
The predefined format may comprise a time series matrix, an objectified time series matrix, or anther format. The predetermined format may include at least one region comprised of at least one collection of time series of specific physiologic components. For example at least one of inflammation indicators, respiratory indicators, cardiovascular indicators, and metabolic indicators to name a few. The predefined format can comprise a plurality of regions comprised of a plurality of collections of time series of different specific physiologic components. The images may be comprised of aggregations of variations of physiologic data and laboratory data, the variations having positive or negative slopes, and/or aggregations of relational variations of positive and/or negative trends of physiologic data combined with positive and/or negative trends of laboratory data.
The patient data processing system may include an image archive system for archiving images of physiologic failure and for sharing these with other processors to grow the general archive and knowledge of the different images and variations of the images of failure. The patient data processing system may convert the time series matrix into a predetermined format of the time series matrix and image the formatted time series matrix to detect an image indicative of physiologic failure.
One embodiment comprises a patient data processing system having an object recognition system, for processing medical records of at least one patient comprising a computer programmed to convert the medical records of at least the physiologic and laboratory data of at least one patient into a time series matrix defining vertical and horizontal axes, and, using the object recognition system, search the time series matrix continuously or intermittently for a cascading plurality of relational patterns indicative of evolving physiologic failure along both the vertical and horizontal axes of the matrix.
Another embodiment comprises a patient data processing system for analyzing electronic medical records for real-time detection of physiologic failure comprising steps of continuously or intermittently search the medical records to detect events along the time series matrix, detect relational events along the time series matrix comprised of the detected events, detect relational cascade patterns comprised of a plurality of combinations of relational events, take action based on the detection of the at least one pattern wherein, for example, the pattern is indicative of physiologic failure.
In one embodiment the search engine is programmed to detect cascades comprised of at least a plurality of linked perturbations and trends of physiologic and laboratory data associated with relational compensation creating a progressively enlarging aggregation of progressively greater numbers of perturbed physiologic and laboratory data. The processor may be further programmed to determine at least one characteristic of the cascade, the characteristic comprising at least one of, the severity of the cascade, the duration of the cascade, the time of onset of the cascade, and the maturity of the cascade, the timing relationship of the cascade to other events or other cascades, the cost associated with the cascade, the global pattern of the cascade, the time of termination of the cascade, the components of the cascade, the state of evolution of the cascade, the length of stay subsequent to or in association with the cascade, the treatments associated with the cascade. The characteristic of the cascade may be defined by, for example, the number of perturbations and/or trends which comprise the cascade, the severity of the perturbations and/or trends, the number of systems affected by the cascade, the presence, number and/or severity of failure of compensation in response to perturbations associated with the cascade, and the growth of the cascade to name a few. The processor may be programmed to determine the rate of growth of the evolving cascade as by for example one or more of the increase in number and/or severity of new perturbations being added per unit time, and the increase number of systems affected, and/or the increase number of perturbations present in different systems, to name a few.
The processor may be programmed to detect the events or components which are temporally and/or spatially associated with the cascade but which are not part of the cascade for example treatment, surgical procedures, transport, injections, blood transfusion, sedation, IV assess, catheterization, manipulation, to name a few.
A processor-based system may characterize and quantify patient physiological conditions by analyzing data relating the patient into time series data and then generating an image or moving image of the abnormal components of the time-series that may be further processed into operator-interpretable data. According to one embodiment, this may be accomplished by generating a large set of time-series of data relating to the physiologic system, converting the datasets (including monitored datasets, laboratory datasets, and historic datasets) into parallel time series of each data component, separating the unperturbed time-series components from the perturbed time-series components, aggregating the abnormal components into a real-time motion pictures of the abnormal components, and recognizing and interpreting the motion pictures and the events relational events and image components of the motion picture.
In one embodiment, data from the electronic medical records and patient monitors are used to generate graphical displays, which may include moving pictures of the patient condition. In an embodiment, such moving pictures, or animated displays, may be referred to as “motion pictures of physiologic condition” (MPPC). Provided herein is a processing system and method for generating real-time MPPC of clinical data. The data and/or images may also be analyzed to detect perturbations, aggregate and cascading perturbations, perturbation relationships, physiologic responses to perturbations, treatments associated with the perturbations, physiologic responses to the treatments, physiologic failures, testing failures, treatment failures, and communication failures to generate the MPPC. In addition, the MPPC may also include a graphical representation of any treatment applied in association with the clinical condition.
Once the image or moving image (i.e. an image that includes more data over time as the patient monitoring progresses) MPPC of the patient condition has been generated, this image may be further processed to create an operator-interpretable indicator to assist in patient diagnosis and/or treatment. For example, the image may be directly compared to a database of similar images taken from patients with clinically confirmed diagnoses. The database image or composite of multiple images with the greatest similarity to the generated image may indicate the correct diagnosis for the patient. For example, if the generated moving image, particularly as the image progresses over time, has the greatest similarity to a database image indicating “myocardial infarction,” a processor may generate a text or other indicator to a healthcare provider indicating such a diagnosis. The processor may also indicate that additional tests should be ordered to confirm the diagnosis. The processor may also indicate and/or provide orders for specific treatments in light of the diagnosis. In an embodiment, a moving image may be indicative of two or more clinical conditions. The processor may indicate tests that may rule out one or more of such conditions. In addition, over time, one condition may be determined by the processor to be more likely while additional time-series data may also rule out another condition.
These database images may be formed from retrospective clinical data. In an embodiment, the images may be analyzed for similarity by any suitable technique, including image registration. In an embodiment, the individual time-series objects that make up the image may be processed as a group for similarity to other groups of time-series objects associated with a particular diagnosis or clinical condition. The MPPC may, for example, include abnormal and/or perturbed components and in particular “Motion Pictures of Physiologic Failure” (MPPF) of the physiologic system and of exogenous forces relating to that system.
Also provided herein is a processor and processing method for the automatic generation and/or analysis of the images of physiologic and/or clinical condition and the characterization and aggregation of the image components of complex dynamic systems, such as physiologic systems and medical care systems. The processing system may generate real-time MPPC of healthcare signals and processing those images to timely detect perturbations, aggregate and cascading perturbations, perturbation relationships, physiologic responses to perturbations, treatments associated with the perturbations, physiologic responses to the treatments, physiologic failures, testing failures, treatment failures, and communication failures to generate and then recognize motion pictures of physiologic failures and of the treatment applied in association with the failures. According to one embodiment, a processor first renders parallel time-series from each of a plurality of sensors and testing sources, which are applied to broadly monitor the dynamic system for failure. In an example, a processor programmed with instructions for time series objectification of patient data detects patterns along the parallel times-series, converts these patterns into time series of discrete objects, then organizes these objects into discrete relational objects (such as binary objects, or relational binaries, derived of relational object pairs). The processor then organizes the relational binaries to render a unifying programmatic image of the physiologic system and the care provided. The processor then automatically recognizes objects in the image components and may be able to perform analysis on the images.
One embodiment may a patient safety processor having a single processor or a combination of processors programmed to generate time series objects, a relational binaries, moving images, patient safety images, and/or patient safety visualizations. The patient safety processor outputs images of the patient's physiologic system and medical care. In an embodiment, the processor includes processing functions for time series objectification, relational binary processing, and an imaging processing. In an embodiment, the imaging processing includes a single matrix construction processor.
According to an embodiment, perturbations detected by the processor are converted to image components that may be used to generate a moving image. In an embodiment, an MPPC may be representative of a “motion picture of physiological failure” (MPPF) when a failure image becomes progressively more complete and recognizable by the processor as each additional failure image component is added. One embodiment may involve building a dynamic real-time image of disease, injury, and/or drug reactions, the care provided, and the expense associated with that care. The image is initially associated with initial image components including one or more minor perturbations, which may for example be caused by circulation of one or more toxic and/or immunogenic material of endogenous or exogenous origin. At first these perturbations, such as toxins, inflammatory and/or thrombogenic mediators, may induce and/or cause only minor changes in cell permeability, ion flux, and trigger various minor physiologic perturbations and responses each of which may produce an image component. The measurements of various mediators, ions, biologic profiles, as well as standard blood tests, and the outputs of vital sign monitors may begin to vary as a function of these early physiologic perturbations and responses, and it is these variations that enlarge the group of image components from which the larger image (i.e. the MPPF) is derived. Early in the process, each of these alterations in permeability, cell injury, mediator production, and physiologic perturbations, when considered in isolation, are often minor. However, collectively they may represent the early manifestations of a nascent and evolving moving image of a serious clinical condition.
According to one embodiment, each perturbation is programmatically organized to form an image component of the MPPC. Many of these detected images components may be isolated because they are related to a benign process, and the image may self-extinguish or may not develop into an image associated with a clinical condition involving intervention or an MPPF. Yet, as noted above, others may represent the first image components of an early moving image. Provided herein are systems and methods for the detection of the early image components of an evolving moving image to provide timely detection of physiologic failures before these failure progresses to shock (including, for example, hypovolemic, obstructive, septic, toxic, cardiogenic, hypoxic, and/or hypercarbic shock.) In one embodiment, it is advantageous to detect the early image components of the moving image before shock develops to improve the prognosis for the patient and to apply goal-directed therapy while clinical intervention is still beneficial.
According to one embodiment, a patient safety processor generates a MPPC, which may be used for processor-based protocolization of care. This motion picture may be comprehensive of multiple data sources, including not only the events comprising a single or few parameters, such as heart rate, but also other parameters that may include, for example: the slope and pattern of the heart rate, the slope and patterns of the systolic pressure variation, the slope and patterns respiration rate, the slope and patterns SPO2, the slope and patterns ventilation-oximetry index, the slope and patterns drug and fluid infusion rate, the slope and patterns blood pressure, the slope and patterns of the Neutrophil count, and the slope and patterns of inflammatory and/or thrombotic markers, and various other blood, urine and/or exhaled gas test to name a few. The signals from all of these sources may be converted to time-series and/or step functions and may, for example, be physiologic signals, therapy signals, laboratory signals, or historical signals, which may be objectified, as by an objectification processor, to produce the discrete programmatic objects (events). According to one embodiment, the processor detects a first discrete event that includes a pattern or value of at least one medical signal, and a second discrete event that includes a second pattern or value of at least one medical signal, the processor then aggregates at least the first event and the second event to produce a first relational object, the processor further detects a third event that includes a pattern or value of at least one medical signal, and a fourth event that includes a second pattern or value of at least one medical signal, the processor then aggregates at least the third event and the fourth event to produce a second relational object. The first relational object and the second relational object are then aggregated to produce a first image component. Additional image components are built accordingly and the image components are then aggregated according to the time of occurrence to derive the moving image and care.
In an example, the pulse related components of the typical motion picture of sepsis failure cascade would include occurrences such as early rise in heart rate, rise in pulse amplitude, and rise in slope of the pulse upstroke (as measured at the finger tip) in combination and typically proceeded by a brisk rise in inflammatory markers. In contrast the typical motion picture of occult hemorrhagic failure cascade (as for example due to heparin related retroperitoneal hemorrhage) would include occurrences of an early rise in heart rate, a fall in pulse amplitude, and a fall in slope of the pulse upstroke (as measured at the finger tip) and a rise in the respiratory related pulse pressure variation and a fall in hemoglobin. According to one aspect of the present invention all of these occurrences along the image of an occult hemorrhagic failure cascade can all be derived from a multi wavelength pulse oximeter.
According to an embodiment, a relational binary processor is provided that divides detected variations into discrete alpha events and beta events, which are combined by the relational binary processor to construct the relational events which are termed relational binaries. These relational binaries are aggregated according to timing to construct image components. These image components are then further aggregated according to timing to construct and progressively build MPPC (from which visual images or electronic representations may be derived as desired). These MPPC are often moving images of catastrophic cascading failures, thereby allowing more reliable detection to allow timely rescue of the patient.
The signals may be chemical or physiologic measurements, as provided by patient monitors, recorded in the electronic medical record, and/or may be biomarkers specifically ordered, either automatically by the processor or manually by the clinician to indicate the potential presence of the sepsis (as those, for example, disclosed in U.S. patent application Ser. Nos. 10/704899, 11/647,689). The presence and/or concentration of such markers may be presented in the context of the MPPC with the timed positioning relative to the others parameters, which then allows the relevance of the biomarker to be much more readily identified. According to an embodiment, the temporal and relational pattern of inflammatory markers and temporal and relational patterns of contemporaneously measured or associated physiologic parameters are aggregated to produce a progressively enlarging MPPC of an evolving patient condition.
Therefore, to achieve the detection of various pre-shock states as well as earlier detection of failures, one embodiment detects early variations and aggregates them to provide an MPPC to dynamically present expanding failure cascades of pre-shock and shock states. This allows separation of expanding images from the smaller and less expansive image components having benign characteristics, and further allows separation of the images of minor isolated failures from failures that progress to generate an expanding MPPC heralding the potential for transition to one of the shock states. Each group of images as well as the complete MPPC and care may be analyzed for the purpose of assessing patient care in a hospital, a ward, or under the care of a given healthcare worker.
The occurrence of a large number of image components indicating non cascading failures which self extinguish may be indicative of an unstable patient population or poor health care delivery. In the alternative a large number of cascading failures are indicative of major risk of a high rate of death or injury in that environment or under that healthcare workers care. The MPPC and the image components may be used to determine if that is due to the patient population or the quality of the care.
One embodiment detects failure cascades along with the determination of the specific fundamental perturbations, or treatments, or lack of treatments that occur early in a failure cascade. Specific fundamental failures are detected before they progresses to complex failures and particularly before they progresses to the pre-shock or shock state. Furthermore, the processor builds an image derived of the relational perturbations and treatments as the cascade expands. According to one embodiment, each time series is processed to separate expected events from unexpected events. The unexpected and/or abnormal events are then aggregated further to repetitively generate relational events, image components and finally the MPPC which comprises a motion picture of the cascade (if present) as well as the treatment applied in association with the cascade. This MPPC is further processed to allow the detection of the probable cause or causes of the occurrence of the moving failure images well as the image components of the MPPC as it evolves thereby allowing detection of the nature and cause of the failure cascade.
As noted above according to one embodiment, an analysis is provided wherein the fundamental components of the analytic process comprise a basic relational variable that includes a plurality of events. In a preferred embodiment, the basic relational variable is that includes two events (a relational pair) and this is called a relational binary. In one embodiment, the relational binaries are initially selected by the users as from a menu (or by a drag and drop interface) of relational binaries and/or of events from which the user builds the desired object binaries the binaries are then used as by drag and drop to build the image components and MPPC for detection. This may be performed by, for example, by national or regional expert groups, or by specific departments in a hospital, or by an individual physician to provide custom management. This may also be automatically performed by the processor (as, for example, through the investigation of a large number of historical data sets that have been comprehensively analyzed and categorized according to outcomes. The objectified time series matrix and/or the MPPC may be may be outputted in various interactive, hierarchical, and relational formats for review and automatic or manual adjustment.
The MPPC may detect a wide range of failures. For example: “physiologic failures, treatment occurrence failures indicating the absence of expected treatment in relation to a given perturbation, testing occurrence failures indicating the absence of expected testing in relation to a given perturbation, treatment response failures indicating the absence of the expected correction of perturbation or the occurrence of a new potentially complicating perturbation in relation to a given treatment and/or dose.
The processor combines the complex data of the electronic medical record into a single motion picture of perturbations, treatments, physiologic responses, diagnostic testing, recoveries, diagnoses, missing data, patient locations, and/or other datasets. Dynamic images are generated of relational variations of a set of time series associated with a complex system to generate a real time motion picture of a failure of the system and/or of forces applied to the system. According to one embodiment of the present invention, the patient safety processor automatically outputs a unified timeline, for example, derived of detected images of a given type. According to another embodiment of the invention the processor, upon detecting a failure cascade, may present and highlight the evolving MPPC in real time on an outputted display of an image diagram for the physician to review. The portion of the motion picture, which has already been completed, may be reviewed backward and forward to review in a single summary snap shot view.
In one embodiment, an electronic medical record may be converted to an MPPC. A patient data processing system comprising a processor programmed with instructions for converting an electronic medical record into trend data, such as sequential, timed data, for example trends of physiologic parameters and laboratory data over time. When the data is converted into trend data, the processor may detect relationships between the trend data. For example, such relationships may include positive and/or negative trends. The relationships may be relational trends (i.e., when one parameter goes up, another parameter goes down). Complex cascade patterns of physiological conditions may be formed from a plurality of combinations of relational trends. The complex casade may form an MPPC, for example of sepsis, severe sepsis, septic shock, and microcirculatory failure, a shock cascade, and a septic shock cascade.
For example, a processor may process the electronic medical record and search to detect sequential and timed trends including positive and negative trends of physiologic parameters and laboratory data. Then, the processor may determine relational timing of the detected positive and negative trends to detect a complex cascade patterns that include a plurality of combinations of positive and negative trends evolving in sequential timed relation to each other. The processor may output an indication of the detected complex relational cascade pattern. For example, the indication may be physiologic failure, such as sepsis, severe sepsis, septic shock, and microcirculatory failure, a shock cascade, and a septic shock cascade. The processor may also provide detailed information about the individual trends, such as the length of each trend or the timing of the entire cascade. If therapy information is included in the electronic medical record, the image may include an indication to mark the onset of therapy and to determine and output at least an indication of timing of therapy in relation to the cascade. If the electronic medical record is from a patient that is still in care, the processor may include an alarm functionality to indication early points in a failure cascade.
In another embodiment, a patient data processing system may identify specific positive and negative trends, such as a combination of inflammatory trends, metabolic trends, hemodynamic trends, hematologic trends, and respiratory trends. After the identification of the trends, the processor may identify the relational timing of positive and negative trends, which relationally or collectively are indicative of the septic shock or pre-septic shock failure cascade to identify and output an indication of the septic shock or pre-septic shock failure cascade.
During a failure cascade, the earliest point in the cascade may include an earliest trend (e.g., a respiratory, immunologic, hemodynamic, or other patient trend) that marks the beginning of the cascade. Therapy intervention at this point may have the highest chance of success. In one embodiment, a processor may analyze the relational pattern to identify the earliest trend of a component of the cascade, identify the onset of treatment, and identify the timing of treatment in relation to said earliest trend. Such analysis may benefit caregivers in determining which therapies have the highest success rate for a particular physiological condition cascade. Alternatively, such information may also help a physician determine which types of cascades are likely to be self-limiting.
Many physiologic failures such as, for example septic shock, pulmonary embolism, congestive heart failure, respiratory arrest due to narcotics in the presence of sleep apnea, thrombotic thrombocytopenia purpura (TTP), hemorrhage due to anticoagulation, respiratory failure due to bronchospasm, and adult respiratory distress syndrome, but not limited to these clinical conditions, begin with one or two non-specific perturbation(s). Physiologic failure is commonly a relational expansion, often beginning with a fundamental physiologic perturbation at a single focal point in time. In fact, this initial perturbation is often completely masked once the cascade has progressed past a certain point. In such cases, testing or monitoring for the single perturbation may not be useful for making a diagnosis. In many cascading clinical conditions, the first perturbation(s) of the cascade may often only be detected in retrospect after the cascade has further progressed when the first perturbation(s) is no longer present. This provides a basis for optimizing the detection of the first point(s) by real-time imaging of the cascade as it develops and then examining the image to determine the first perturbation(s).
While a pattern of a single time series provides a larger image of a dynamic process than a single value or range, such a pattern is still only a tiny image fragment of the process. The determination of thresholds and even the detection of various patterns of perturbations comprise incomplete analysis, which will inevitably allow an unacceptable rate of progression to catastrophic failure. Even in situations wherein a measurement or test may seem definitive as a stand-alone test, action or conclusions based on a single value (or an average of a plurality of values) will have a reasonable probability of being incorrect. Consider, for example, a single measured spot SPO2 value of 94. This value is largely meaningless without knowing if the SPO2 is rising, falling, or cycling. Yet this infinitesimal image fragment of a patient's complex physiologic system is used everyday in hospitals to determine care. Furthermore, even if the pattern of the SPO2 is known (for example the SPO2 has been stable at about 94 for at least 12 hours) this is an incomplete image, which is largely useless and, in fact, a potentially misleading piece of information. Without knowing the relational pattern of the minute ventilation during the related time interval of the measured SPO2 pattern, the healthcare worker may be lulled into a false sense of security even as the patient is dying of septic shock or heart failure. Furthermore, an alarm or interpretive output which is based on a programmatic image of both the patterns of both the SPO2 and the related minute ventilation without additional relational elements of the image, such as, for example, the associated pattern of the white blood cell count, temperature, pulse, blood pressure, microbiologic values, and medications will be incomplete leaving too much synthesis for the healthcare worker. In another example, consider the detection of a pattern of a sustained rise in pulse or respiration rate. Each such pattern represents a tiny fragment of the present physiologic state and each pattern may be benign or alternatively may be an early image component of a much larger dynamic process of failure often associated with an evolving failure cascade. The difference between a benign or pathologic rise in pulse or respiration rate cannot be determined with this tiny image alone and often cannot even be known at the time of the onset of the rise. Therefore a tree diagram protocol with a branch based on a rising pulse or rising respiration rate adds a great degree of programmatic complexity with a high risk that the protocol will precede down the wrong pathway.
As noted above when the detection and the determination of the mode of potentially fatal but profoundly complex physiologic failures is left to a population of heterogeneous healthcare workers, an unacceptable rate of death may be anticipated.
As well, an incomplete analysis of the physiologic system will often cause the healthcare worker to generate a large amount of investigation, testing, analysis and evaluation that is not necessary and therefore increases the cost of overall care. Further, these false paths of treatment and evaluation may distract the care worker from the determining the actual operative failure modes, which will ultimately induce adverse outcomes.
Prior to shock, a patient's physiologic system is perturbed by both disease and treatment. A given treatment provided to correct a perturbation might reduce the perturbation, have no effect on the perturbation, exacerbate the perturbation, cause another perturbation and/or make another perturbation worse or better. To determine which effect a treatment is having and to assure that this determination of treatment effect is complete, it is necessary to collect and, just as importantly, as provided by one embodiment, organize and analyze large amounts of relational data in a timely manner.
Another problem is that, within present hospital systems the healthcare worker is forced to do a great deal of archeology (digging, isolating, identifying, etc.) before synthesis may be effectively completed. For this reason, the synthesis of information by the healthcare worker is often not executed in a manner, which allows immediate searching, filtering, re-analysis, etc. This friction combined with the typical workload of healthcare workers limits the number and range of high-level scenarios, which may be investigated. Also the healthcare worker may, because of lack of available organized data and time, execute decisions without a complete set of synthesized information and worse, may not realize that this is the case.
For these reasons, even with conventional electronic medical record embedded protocols, patients remain subject to a range of failures across a broad range of failure modes based on the complexity of their individual condition and the complexity of the environment facing the care giver. In fact, because failures often overlap, one protocol may reduce the risk of one failure while increasing the risk of another. For example, oxygen given to treat hypoxemia under one protocol may delay the detection of pulmonary embolism by stabilizing the SPO2 and hiding the early signs of impending shock from the healthcare worker.
Although the number of potential modes of failure is very high in any hospital environment, the occurrence of certain modes of failure is reasonably likely under a given set of circumstances in the hospital. A failure mode diagram illustrating common modes of failure given a combination of a group of diseases is shown in
The data management system 300 may include one or more processor-based components, such as general purpose or application-specific computers. In addition to the processor-based components, the data management system 300 may include various memory and/or storage components including magnetic and optical mass storage devices and/or internal memory, such as RAM chips. The memory and/or storage components may be used for storing programs and routines for performing the techniques described herein that are executed by the processor 304 or by associated components of the data management system 300. Alternatively, the programs and routines may be stored on a computer accessible storage medium and/or memory remote from the data management system 300 but accessible by network and/or communication interfaces present on the computer.
The data management system 300 may also comprise various input/output (I/O) interfaces, as well as various network or communication interfaces. The various I/O interfaces may allow communication with user interface devices, such as a display, keyboard, mouse, and printer that may be used for viewing and inputting configuration information and/or for operating the system 300. The various network and communication interfaces may allow connection to both local and wide area intranets and storage networks as well as the Internet. The various I/O and communication interfaces may utilize wires, lines, or suitable wireless interfaces, as appropriate or desired.
In an exemplary embodiment, the device 306 is turned on as for continuous viewing (with a notification) by the processor 304 when images are indicative of a significant potential failure and/or cascade process or at a point wherein the patient's risk class exceeds a threshold value. The risk class may, for example, be derived as a function of a calculated instability index or a detected instability index pattern and/or detected failures. The instability index may be, for example, a confidence metric correlated with a matched image. For example, when an MPPC has a high likelihood of being associated with a serious condition, the instability index may be high. The instability index may be a numeric index, a color or graphic indicator, and/or an audio or text message.
In accordance with an exemplary embodiment, the device 306 includes an interactive single screen displaying items, such as one or more working diagnoses, differential diagnosis, parameters derived from patients including laboratory parameters, monitored parameters, and subjective parameters (e.g., sedation scale, confusion scale, or pain scale) or the like. In an embodiment, the term “parameter” herein may refer to an absolute or relative data point or set, a pattern, or a deviation, a range of such data points or sets, a pattern of such data, a relationship along a single set of data and/or or between a plurality of sets of data, and/or patterns of data. The data may be an objective data type or subjective data type and may be directly and/or indirectly derived or historical in origin. In addition various outputs from the failure imaging processor 360 (
The data management system 300 further includes a medical records database 308 including laboratory data 310, historical data (e.g., diagnosis) 312 and therapy data (e.g., medications) 314. The medical records database 308 is coupled to the processor 304 and to the monitor 302 so that those systems may have access the data stored in the medical records database 308. The processor 304 may include a component or direct link to the centralized patient medical record, which contains real time data and receives data input from all hospital sources. Thus, a database containing substantially all of the components relating to the patient available to the hospital may be directly accessible to the processor 304 in real time to allow the embedded relational processor render relational binaries, and construct and detect failure image components which include these data from varied sources.
In accordance with an exemplary embodiment, the processor 304 is adapted to comprehensively engage the medical records database 308. As discussed further below, the processor 304 may be programmed to provide for formal, automatic simultaneous engagement, of physiologic failure image components, medication failure image components, testing failure image components, aggregate failure image components as derived from the relational processor and to render them in a timeline for viewing.
The processor 304 may be adapted to provide an immediate review of all failure image components and to take action based on the detection of specific failure image components. The processor 304 may be capable of responding faster and more reliably than the healthcare worker because it may be adapted to constantly monitor the evolving failure image components form the earliest onset of the first divergent binary. The processor 304 may therefore detect failure image component cascades, which originate from single divergent binaries, which might easily be undetected by the healthcare worker until it is too late. The processor 304 may also be programmed to alarm on divergent or null binaries upon which no action has been taken or upon which the action has not corrected the evolving divergent binary or failure image component. For example, in a scenario in which the processor 304 has been updated by the nurse that a blood culture has been obtained, the presence of a null binary may be generated indicating testing failure image component if after a pre-selected time the result is not available to the processor 304 whereas the presence of a divergent binary indicative of a physiologic failure image component may be detected if the culture is positive. If testing failure image component is detected the processor 304 notifies the lab of the apparent delay. The notification is an alpha event and a receipt response to that notification is a true beta event. Therefore the failure of the lab to indicate receipt may cause the occurrence of a divergent binary, which may trigger the notification of the nurse in the same manner until a convergent binary concludes the sequence. If on the other hand, a physiologic failure image component is detected (the culture is positive), the processor 304 notifies the nurse again in the same binary generating fashion.
While a positive blood culture is the beta event of the culture testing binary, it is the alpha event for another group of testing binaries such that the initial divergent testing binary may cause the processor to assure acquisition of a complete blood count, a comprehensive metabolic profile, increased frequency of blood pressure and pulse measurements, ventilation indexing oximetry and other testing as programmed into the processor 304 in response to the specific divergent binary detected (in this case a positive blood culture). These new testing binaries may generate unexpected beta events (such as a low blood pressure, a high pulse, or high ventilation to oximetry index) and these beta events may thereby define a new set of divergent physiologic binaries. This new set of divergent binaries (in aggregation) may be sufficient to meet the pre-selected criteria of an aggregate failure image component suggestive of early septic shock, which diagnostic consideration now comprises an alpha event to a plurality of new binaries which have been programmed into the processor to assure timely and proper monitoring, timely proper patient location, and timely proper diagnostic testing, and timely and proper intervention in the event of the detection of this type of aggregate failure image component. In addition, the beta events of the divergent physiologic binaries which comprised the aggregate failure image component now become alpha events for new physiologic binaries wherein the beta event of each of the new binaries comprises the return of each these values back to a normal range within a pre-selected time period (thereby assuring, that the aggregate failure image component is corrected timely, if possible). In additional, the positive blood culture is also the alpha event for a treatment binary such that the processor 304 may be expecting to see the correct antibiotic in response to positive blood culture administered within a pre-selected time interval. If this does not occur a divergent binary indicating treatment failure may be identified and assured nurse notification may proceed by the binary building method previously discussed.
According to one embodiment, in response to the detection of any significant divergent physiologic binary, the device 306 may be programmed to prevent the failure of notification by building a set notification binaries, which must end with convergence. The device 306 may also be programmed to prevent failure to timely treat by building a set of treatment binaries, which must end with convergence. Further, the device 306 may be programmed to prevent failure test by building a set of testing binaries, which must end with convergence. The device 306 may also be programmed to detect associated physiologic failure image components by identifying divergent physiologic binaries in associated with the initially discovered divergent binaries.
According to one embodiment, the PSP includes an associated, connected and/or embedded eventing system. In this eventing subsystem, users may designate actions to be initiated or data to be recorded when a specific occurrence is identified. This eventing system may interface with other internal or external systems including notification systems, workflow systems, asynchronous communication systems, reporting systems, decision support systems, dashboards, data warehousing and/or data mining systems to name a few.
According to one embodiment the relational processor is self-modulating and provides an automatically expanding analysis, which is rapidly responsive to the occurrence of even a minor failure image component. The analytic activity of the processing system is capable of multidimensional growth and diminishment in direct response to the magnitude and number of failure image components detected. In this regard, the processor 304 upon the occurrence of a physiologic failure image component may generate a cascade of notification, testing, treatment, and physiologic binaries even if that failure image component comprises only a single physiologic divergent binary. The beta event of the physiologic binary may comprise the alpha event of each of a new generation of notification, testing, treatment, and physiologic binaries. Each of these new binaries also have a beta event, each which may induce the formation of other binaries wherein the beta event comprises the alpha of another binary of the same or another type. A spontaneously growing cascade of binaries thereby evolves toward assuring timely notification, timely testing, and timely restoration of physiologic stability.
A rapidly expanding, cascade of these types of divergent binaries indicates evolving patient instability of the patient or poor performance of the healthcare system. An analysis (as by objectified pattern recognition or statistical analysis) of the timed patterns of the types and sequence of the divergent binaries may allow the determination of poor health or poor responsiveness of the healthcare worker is causing the cascade to be propagated. As health is restored, and provided the healthcare workers are timely responsive, the binary cascade may automatically diminish and the various failure image components may no longer be detected. The outputs of the relational binary object processor therefore provides a self modulating processing system which may be readily used and further analyzed to track the health of a single patient, or the patients on a given floor, or the patients hospital wide. The outputs of the object binary processor also provides a self modulating processing system indicative of the quality of healthcare delivery provided to a given patient, on a given floor, or hospital wide.
The processor 304 may be applied to other complex dynamic data sets other than medical data wherein a self-modulating relational analysis and control would be useful. The processor 304 has utility for the data mining, for example in association with the processing of archived datasets to identify the failure image component process from the initial spark (the first divergent binary) to extensive system failure. The processing of archived datasets provides the opportunity to review the automatic modulation of the binary cascades which are derived of various failures and to facilitate the construction of dynamic failure image component diagrams for complex processes in the hospital, as well as in industrial processing such as the food, chemical, or pharmaceutical processing. The processor may be programmed such that the user may select each alpha event and allow the processor to detect, offer, and/or derive events and relational binaries, which have specified temporal, frequency, or spatial relationships with the selected event object. Alternatively the processor 304 may be programmed to construct its own set of convergent object binaries with a learning dataset by processing the outputs of healthy individuals and then the processor may be used to detect divergent binaries when applied to patients by identifying the lack of the expected beta events (which were defined by the learning dataset). Sensitivity for cascading (the initiation of further processing based on the detection of a divergence or a failure image component) may be adjusted by modifying the sensitivity for trueness of the beta event or by modifying the criteria such as slope, or magnitude of the objects during the objectification process. This provides a high degree of flexibility in defining sensitivity to the designation of a binary as divergent and this therefore allows a high degree of control over the sensitivity to cascade initiation, propagation, and extinguishment. Cascades may be modular or divergent or failure image component specific. A modular group of cascades may be selectable from a menu and then each one in the group modified as desired.
As shown in
According to one embodiment, the relational binary processor 348 and the time series objectification processor 336 may adapt to the output of each other to modify the analysis. For example, the detection of an event, a reciprocation, an incomplete reciprocation or other objects or patterns by the time series objectification processor 336 may cause an adjustment to the cascade responsive to the detection of a divergence. Alternatively or in combination the criteria for designation of a wave segment as an event object within the time series objectification processor 336 (for example the slope criteria for identifying a fall event object of serum sodium) may also be adjusted based on the presence of a specific alpha event. In an example, when an alpha event comprising a diagnosis of cerebral vascular infarction (CVA) is detected, this may cause the time series objectification processor 336 to reduce the absolute slope (less negative slope) for designating a fall event object of serum sodium, which, is preferably one of the betas in such patients. By automatically reducing the absolute slope for the designation of the beta event the alpha diagnosis of cerebral vascular infarction is adjusting the sensitivity of the diagnostic process allowing automatic and dynamic adjustment upon the occurrence and detection of different physiologic vulnerabilities. In this example, the increase in sensitivity for detection of a fall event object in serum sodium (which, combined with the alpha that includes a CVA diagnosis) would comprise a divergent binary), which may trigger a diagnostic cascade for close monitoring of the serum sodium and/or the evaluation of additional laboratory studies and/or the reduction of free water delivery. This is desirable due to the unique vulnerability faced by patients with CVA as a function of the potential for inappropriate increase in anti-diuretic hormone due to the CVA.
Since the relational binary definitions within the binary definition set 344 may be individually defined and refined by processing large populations of historical data, correlations may be verified, rather than being simply proposed and maintained as a function of consensus or expert opinion. In one embodiment, cascades originated by criteria for divergence provided by an expert, which untimely lead to extinguishment without intervention may be automatically adapted to either change the sensitivity for the detection of the divergent beta or to change the cascade resulting for the divergent binary. In another example, cascades originated by criteria provided by an expert which continue self propagate and expand despite timely action and without progression of the physiologic divergence may be automatically adapted to either change the sensitivity for the detection of the divergent beta or to change the cascade resulting for the divergent binary. The sensitively and specificity may be further enhanced because the system may be applied to archived training data sets wherein the outcomes are known so the magnitude and direction of the cascades may be compared to the desired magnitude and direction of the cascades and adjusted accordingly. With applied archived datasets the application of auto-adaptive adjustment in event criteria, divergence criteria, or cascade generation may be applied until the cascades proceed without premature auto extinguishment and excessive propagation. Furthermore the system may be applied to hypotheticals on the missing data to allow determination as to how they might affect incomplete (null) binaries.
According to one embodiment the processors, including the time series objectification processor 336, the relational binary processor 348 and failure imaging processor 360, may output the results of their analysis into the MPPC Database 368. The MPPC Database 368 contains the time series 328 on which the analysis was performed as well as the results of analysis including the event streams 340, the relational pairs 352, the aggregate failures 364 as well as aggregations, relationships and alternative images of these elements. In one embodiment, the metadata rule-sets (both primary and alternative and/or temporarily overridden or altered elements) are persisted as XML (Event Definition Set 332, Binary Definition Set 344, Failure image component Definition Set 356) in the Patient Safety Image Database 368.
Time Series Objectification ProcessorA time series objectification processor 336 may contain instructions as provided in U.S. patent application Ser. Nos. 11/280,559, and 11/351,449 the specifications of which are incorporated by reference herein in their entirety for all purposes. Accordingly, such processors may function by constructing a time series of each parameter derived during the process of the hospitalization and then objectify each time series. These time series may, for example, include objective measured values, drug dosing, infusion rates, and subjective clinical scores to name a few. At least some of the time series may be provided as a step function. For example, time series of the weights, serum sodium values, SPO2, respiratory rate, heart rate, drug infusion dose, sedation score, pain score, stupor score, working diagnoses, an instability score, a severity of illness score, to name a few, may all be included. From these time series, the time series objectification processor may render an aggregate “object cylinder” or time series matrix for example, which may include parallel streams of objects derived from all of these time series.
In an embodiment, a time series objectification processor converts a set of time series into a stream of sequential and overlapping discreet elements or objects such that substantially the entire time series of data is converted to a time series of objects in a relational hierarchy of ascending complexity. The objects into which the time series is converted may be predefined by the user and/or adaptively defined. The discrete objects which are created represent and characterize an occurrence providing a time location and a set of properties derived from the aggregated data within the boundary defined. This process when applied to a plurality of parallel time series generates an Objectified Time-series Matrix (OTM). Objects may be very simple such as a brief rise or fall along a single time series, or highly complex such as a sepsis cascade object comprised of and inheriting hundreds of simpler objects of relational physiologic variation, treatment, and response to treatment to name a few across a large OTM. These objects along the OTM are differentiated by location and the properties derived and therefore individual objects can be qualified and the objects of the OTM can be searched against. The conversion of the time series matrix to form an OTM provides for identification, qualification and search ability of relationships between substantially all patterns and relationships which is embodied in the data of the EMR. Objectification is therefore one means of converting an electronic medical records into a particular format for imaging or searching for images. The objectification processor may for example be programmed as a continuous search engine to continuously search for predetermined complex objects which at this level of complexity comprise images (such as the image of an evolving sepsis cascades) along both the vertical and horizontal dimension across multiple parallel time series of the OTM). When the electronic medical records (EMR) of a patient is converted into an OTM, the continuous search engine may linked to an alarm processor to thereby provide an automatic alert upon detection of specified images (such as the image of a sepsis cascade, the image of failed or missed treatment, or the image of a drug reaction to name a few). This converts the EMR into a real time image generator with real-time detection of both complex and simple failures. The wide range of simple and complex relational patterns or images which are provided in an inheritance hierarchy of ascending complexity and are continuously searchable are derived of for example physiologic process, pathophysiologic failure, and the care of the patient, to name a few, are all exposed for continuous or intermittent searching or imaging along the OTM
As discussed, one embodiment includes a patient safety processing system, which includes a time series objectification processor 336 and a relational binary processor 348. The relational binary processor 348 may be embedded into, or communicate with the time series objectification processor 336. The time series objectification processor 336 is programmed to convert parallel time series of the electronic medical records from a central source or a wide range of sources as well as from other processors (e.g., the Patient safety processor), into parallel object streams. The relational binary processor 348 then processes the object streams to generate streams and cascades of relational binaries. According to one embodiment, the processor 304 automatically outputs a unified timeline, for example, derived of detected failure image components of a given type. According to another embodiment the processor, upon detecting a failure cascade, may present and highlight the evolving MPPC in real time on an outputted display of a failure image component diagram for the physician to review. According to another embodiment, the processor 304 persists failure image components and all other results of the analysis into the MPPC Image Database 368, which may be the source for visualization, reporting, and interfaces into other systems. The portion of the motion picture which has already been completed may be reviewed backward and forward to review in a single summary snap shot view.
As discussed, according to one embodiment, the relational binary processor 348 generates relational binaries. Such relational binaries include an alpha event object and a beta event object. An early step in this process includes the defining the relational binaries by the user or by the processor. To define a relational binary, first, the alpha event is defined (as by the user or adaptively). The alpha event is defined both in terms of its channel and the object along the channel. In one embodiment, the objects along each channel are defined by characteristics (such as the slope, amplitude, or other features defining the object as discussed in the aforementioned patent applications). Alternatively, threshold violations may be identified as an alpha event. A beta event is defined, again in terms of its channel and its characteristics and may be either a pattern or a threshold event. Both alpha and beta events may also be defined in terms of the relationship of its characteristics to the characteristics of other events, such as those, which preceded the specific event. In one embodiment the user may define the relational objects, (as by using a drag and drop designer), by selecting the channel (which defines the time series type), and by selecting the event objects (for example a fall event or a rise event) which meet specified range of criteria, and by identifying the timed relationship (such as the time interval) of the beta event in relation to at least a portion of the preceding alpha event, and/or by identifying the spatial relationships and/or frequency relationships of one event to the other event. In one embodiment, alpha objects and beta objects are defined by the criteria provided to the time series objectification processor 336 alone for the detection of event objects such that the Relational Binary Processor may be concerned only with the detecting the presence and timing of detected event objects not with modifying or affecting the criteria for event detection if desired. (The detection of event objects by a time series objectification processor 336 may be as disclosed in U.S. patent application Ser. No. 11/280,559 and U.S. Pat. No. 7,081,095, the specifications which are incorporated by reference in their entirety herein for all purposes.) This is not to limit the functionality of the relational binary processor 348 (since processing systems, which incorporate the programming of the relational binary processor 348 to specify criteria, are included in an embodiment,) to detect objects as a function of basic time series patterns by the objectification processes where these basic patterns are converted to discrete objects. The relational binary processor 348 then aggregates the relational binaries according to their time of occurrence and/or to specific criteria for aggregation set by the user or processor to derive image components and the image components are aggregated according to their time of occurrence and/or to specific criteria for aggregation set by the user or processor to derive the MPPC and care derived of events and patterns across hundreds of parallel time series. In a sense, the relational binaries and events become the discrete “pixels” from which MPPC of a patient's physiologic system are constructed by the processor 304.
According to one embodiment, the processor 304 or is also programmed to organize the events and relational binaries into larger aggregate factorable objects, which may also be constructed as a unified object timeline rather than a motion picture. Each aggregate factorable object includes a specific aggregation of events and relational binaries objects. In some aggregate factorable objects, the individual relational binary and event objects occur in a specific sequence or range of sequences (which may be overlapping) and the objects have a specific temporal relationship (or range of temporal relationships) with respect to each other. One specific type of object timeline may be specified as simply a grouped set. In another example, relational binaries are ordered in specified sequence in which the event and relational binaries objects were detected thereby defining the object timeline.
According to one embodiment objects of specified types may also be combined derived to render a “unified patient timeline” which is a simple summary of the patient's physiologic system and care. The MPPC and care provides the information at more comprehensive level. Both may be configured to provide further simplified summarization or image detail revealing drill down. The unified patient timeline may for example, represents an instance of at least one factorable aggregate object derived from a plurality of parallel time series into a single time-series or time line, often of relational binary objects of a specific type or plurality of types. In one instance the unified patient timeline and/or the MPPC and care is constructed to be a life long time line and/or motion picture, which preferably is recorded whenever signals are available, such as during a hospitalization or when connected to a home monitor or when blood testing is made. The beginning of the motion picture or time line is defined by the time of the earliest date of data (which may be derived from archived patient data) the unified patient timeline does not end until a patient dies. Segments of the timeline (or motion picture)may be separated for examination by location of the patient such as a hospitalization segment, or by actions taken to treat the patient, such as a peri-operative segment, or by events relating to altered patients states such as the segment immediately preceding death or while sleeping. According to one embodiment, an object nomenclature is provided which designates the timed and sequence relationships of the binary objects and events of a plurality the parallel patient related time series, thereby converting a large plurality of datasets into this single time series of factorable objects, which is readily outputted interpretable through application of a succinct nomenclature.
In one embodiment the physician may mark a test result or other data point as mistaken or anomalous. In this case the processor splits the analysis into two—the working analysis (which removes or alters the test result or other data point) and a background analysis (which maintains the original data). The processor may run scenarios in which the original test result stays in effect to determine if conditions occur that might have been expected from the “so-called” anomalous test. The background will not affect the working analysis but notification may be generated if a correlation of events is found in a sufficiently suggestive pattern to warrant a consideration that the original test results may not have been mistaken and, in fact, would account for conditions that do not fit the current working state (e.g., the state with the test results removed). Background analyses may be deleted according to time (e.g., after a certain amount of time in which no correlation to following events is found) or at the request of the user or system operator (e.g., to reduce resource utilization).
In another example the processor may be programmed to generate more frequent testing binaries to confirm or exclude an apparently evolving image. In this way the processor is trying to look as far forward as possible with additional testing to confirm the motion picture of a particular failure as early as possible so that the delay associated with waiting for the detection of a failure cascade as by various traditional threshold breaches is eliminated.
In an example, as part of assuring that the future image is complete, the testing binaries are designated such that the addition of certain drugs (the alpha event) into the image, may cause automatic orders for testing to monitor for complications related to the drug (the beta event) if selected, events, binaries, image components, or MPPC are present. In an example, if the physician orders heparin, a testing binary is generated and added to the image which includes automatic order for a platelet count every 48 hours. According to one embodiment, the time series objectification processor 336 is objectifying the time series of platelet counts to detect a least one fall event (as for example defined by a negative slope and/or a magnitude of fall and/or a threshold fall), if a declining slope is detected a divergent binary is generated and a marker indicating a fall is added to the image along the platelet count time series, the processor may generate more frequent platelet testing binaries, to confirm the presence of these divergent binaries in the image. If multiple divergent binaries are detected then the processor may generate different types of testing binaries wherein the alpha event is the fall in platelet count. This may trigger a cascade of testing binaries such as, for example, wherein the alpha event is a binary that includes a heparin treatment and a fall in platelet count t and the beta event is, for example, a platelet factor 4 assay or/or another assay.
In this way, using the failure imaging processor 360, the delay associated with waiting for an absolute or relative threshold drop in the platelet count is reduced. In addition the cascade may include additional testing binaries (as for hepatic function tests, to determine the safety of Argatoban, a medication which may be ordered if the image components are consistent with heparin induced thrombocytopenia. Here the advantage of having these binaries and image components as part of a MPPC is evident, because the processor will be examining the images of the motion picture for other causes of the fall in platelet count which may include cascades indicating TTP as will be discussed and/or occult hemorrhage.
One embodiment programmatically images the parallel physiologic time-series to render a relational pyramid of data with the top of the pyramid representing data at the highest level of analysis and abstraction while data moves down through layers of analysis, the bottom layer being the raw data streams. The healthcare worker may investigate the pyramid in the following ways to name a few:
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- 1) Drilldown—the care worker may navigate into the details of the data and the rationale of the analysis (i.e., both the conditions that exist and the rules by which the analysis has arrived at its conclusion)
- 2) Aspects—viewports into the system which emphasize certain elements/conditions and de-emphasize (and/or filter out) other elements/conditions)
These two examples above may be used together allowing the healthcare worker to navigate through the relational pyramid vertically (drilldown through levels of analysis) and horizontally (through filters/aspects).
In one embodiment the relational pyramid may be manipulated by the healthcare worker and/or researcher to consider hypothetical scenarios or scenarios based on the rejection of certain test results or events which may be considered in error, anomalous or otherwise inaccurate. Alternate pyramids may be stored in whole or as differential images. Alternate pyramids may be compared against the working pyramid to understand the results of the altered data.
In one embodiment, the processor 304 will automatically consider alternate pyramids under certain conditions—such as the existence of perturbation for which no precursors may be identified. The sudden existence of perturbation or of divergence may, by considering the range of possible precursors, suggest anomalous conditions: inaccurate diagnosis, faulty monitoring equipment, labeling mistakes, the failure of a patient to take medication as prescribed, to name a few.
According to one aspect, the values and/or patterns of the blood tests such as the inflammatory mediators is/are compared to the image(s) of physiologic perturbation or to the pattern(s) or values of at least one physiologic parameter, such as the pulse rate, respiration rate, and/or ventilation oximetry index to name a few. Upon the detection of an apparent relationship, the processor may automatically order a sufficing number of sequential blood tests to confirm that the pattern of the parameter is convergent with the pattern of the blood test thereby providing strong supporting evidence, reinforcing redundant evidence, that the physiologic parameter and the mediator have a common physiologic failure based linkage, such as the failure of sepsis for example. One embodiment extends that analysis to incorporate specialized inflammatory mediators into the moving picture of failure so that comprehensive comparison of the marker or indicator to the image of the physiologic parameters and treatment is provided.
The actual relationship between the alpha and beta events, which comprise the object binaries, is not defined by cause and effect (which may not be known with complete certainty) but is rather defined by the pattern relationship such as a temporal, spatial, and/or frequency relationship of the events, or simply by their prior designation as a relational pair. For example, the actual relationship between the alpha and beta events comprising a given relational binary could be a cause and effect, two effects resulting from an unmonitored cause, a relationship between two monitoring technologies measuring the same physiological phenomenon, an expected compensatory response, or a pathologic response, to name a few. One object is to identify the pattern relationship of aggregate objects that include a plurality of relational binaries so that the actual relationships may be defined.
An alpha event is defined as a perturbation, which is defined in terms of its channel (e.g., oximetry) and its characteristics (e.g., a slope, magnitude, duration, and/or threshold breach). A beta event may be defined as an expected response event, defined again in terms of its channel (e.g., pulse or oximetry) and like the alpha event, in terms of its characteristics (e.g., slope, magnitude, duration). In addition, the beta event may also be defined by the spatial and/or temporal relationships to the alpha event or a component or portion of the alpha event. For example, when the beta event is an expected response event, the beta event may be specified as function of the magnitude, slope, timing, or other relationships of the alpha event. Alternatively, in another example, the expected response event may be identified as a being between two values each of which are a function of the magnitude of the perturbation event. The alpha event and/or the beta may, for example, be a perturbation event, treatment event, or a diagnostic designation event to name a few.
According to one embodiment, there are three basic relational binary types; the convergent relational binary, the divergent relational binary and a null relational binary. (Although others relational binaries may be provided). A convergent binary is an alpha event combined with an expected beta event response. If the channel of the expected response is present and uncorrupted, but the expected response is not found, then a missing event (comprising, for example, a wave segment or test result of the region of the expected response) is specified and the relational binary that includes the alpha event and the missing beta event is called a divergent binary. If the channel of the expected response is not present or the wave segment or test result is corrupted in the region of the expected response then the relational binary that includes the alpha event and the untested beta event is called a null binary.
An event may be the alpha event of a first relational binary and the beta event of second relational binary (provided the alpha event and beta events are each along different parallel channels). With some physiologic processes, relational binaries cycle or repeat with a certain pattern and this produces a special case of relational binary clusters or patterns.
In one-embodiment event characteristics may be defined in terms of modifiers defined by patient conditional values such as anthropomorphic values, age, sex, or preexisting disease, such that the presence of these modifiers (as for example provided by a rule system in combination with the event definition menu) causes a change in the event definition parameters and/or threshold values.
In one embodiment the events and/or the relational binaries (convergences and divergences) are aggregated to construct a global factorable object to derive a factorable objectified timeline. The factorable objectified timeline may be rendered graphically or provided by a nomenclature for example, which identifies the events and the time from the onset of the closest preceding event to the onset of the following event.
According to an embodiment, relational binary objects or a specific aggregation or pattern of relational binary objects may be pre-designated by the user to define a failure image component. The processor may then automatically and timely identify the occurrence of the failure image component by searching the event streams, divergence binary streams, and convergent binary streams, which are stored for each patient. In the alterative or in combination, all such streams or a portion of specific streams or a grouping of streams filtered for severity of divergence (for example) may be aggregated and rendered for periodic viewing wherein, for example, the temporal relationships of for example divergent binaries or of the occurring failure image components are easily recognized or specifically indicated.
In the depicted embodiment, the case 404, channel 408 and time series 412 classes represent the data streams from which the analysis may be derived. These classes may be defined as disclosed in U.S. Pat. Nos. 6,609,016 and 7,081,095 and U.S. patent application Ser. Nos. 11/431686, 11/351449, and 11/148325 the specifications of each of which are incorporated by reference for all purposes in their entirety. For each case 404, one or more case analyses 416 may be constructed. A case analysis 416 is the result of a case 404 being submitted to the relational binary processor 348 with a specified binary definition set. A single case 404 may be analyzed with multiple binary definition sets resulting in one case analysis 416 per binary definition set applied.
A case analysis 416 is primarily composed of the relational binaries identified during processing. In one embodiment, the relational binaries are one of three types—convergent binary 440, divergent binary 456 and null binary 428. The case analysis 416 contains a collection of each of these pairs and may have zero of more pairs in each of those collections. As discussed, relational binaries are composed of relational events 444. The structure of the relational binary (i.e., the type of events which compose the relational binary) is defined by its type and the classification is provided to fix the structure of these relationships. In one embodiment, all relational binaries contain an alpha event, which is a true event (e.g., represents the identification of a pattern or a threshold violation, see
Divergent binaries 456 represent a relational pair of events identified in a relationship that contradicts the expected relationship as described in the binary definition set. Therefore a divergent binary 456 may have either a true event 444 or a missing event 460 as a beta depending on what has been specified as the expected condition. If a true event 444 was specified in the binary definition then the associated divergent binary 456 may have a missing event 460 as a beta event. If a missing event 460 was specified then the associated divergent binary 456 may have a true event 444 as a beta event. The class structure therefore allows for zero or one event 444 and zero or one missing event 460. According to one embodiment, a divergent binary 456 may not contain two beta events.
Null binaries 428 represent the existence of a condition in which an alpha event was identified but the data stream from which the expected beta event is to be derived is unavailable to the relational binary processor 348. Events 444 may be isolated (e.g., not part of any identified relational pair) or part of one or more binary. The channel event stream 424 provides an aggregation of events 444 ordered by time and separated by channel 408. A true event 444 is a wave segment 448 (e.g. inherits wave segment) while a missing event 460 is associated with a wave segment 448 that represents the section of the channel 408 that was searched for the event described as expected in the binary definition set. Null events 432 are not associated with wave segments 448 because the channel 408 to which they would have been attached or the relevant section of that channel 408 is unavailable or corrupted. The relational binary processor 348 will convert null binaries 428 to convergent 440 or divergent 456 binaries as channels 408 of data become available.
The analysis contains aggregations of binaries, which repeat (e.g., cycling reciprocations) in three aggregation classes: repeating convergence 436, repeating divergence 452 and repeating null 420. To further clarify this structure it may be useful to describe the order of operation within an exemplary embodiment of the relational binary processor as it constructs the analysis according to one embodiment.
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- 1. Each channel 408 in turn is iterated through and named events 492 and threshold violations 484 (Events which may be identified without reference to relational pairs) are identified and placed into channel event streams 424
- 2. The channel streams 424 are iterated through to match any identified events 444 with candidate alpha events (as defined in the specified binary definition set). A single event 444 may match any number of alpha event definitions and each one is considered a candidate alpha event.
- a. For each candidate alpha event, the specified search region is examined for the expected beta event
- i. If the channel 408 in which the expected beta event is unavailable or corrupted
- 1. A null binary 428 is created (along with its associated null event 432)
- 2. The conditions are examined to determine whether a Repeating Null 420 should be created or appended to
- ii. If the expected condition is found
- 1. A convergent binary 440 is created
- 2. If a relational event 488 was identified in the process it is created and added to the channel event stream 424
- 3. The conditions are examined to determine whether a repeating convergence 436 should be created or appended to
- iii. If the expected condition is not found
- 1. A divergent binary 456 is created
- 2. If a relational event 488 was identified in the process it is created and added to the channel event stream 424
- 3. The conditions are examined to determine whether a repeating divergence 452 should be created or appended to
- 3. Failure image components and aggregate failure image components are identified (See Below)
A limiting event 496 may be either a threshold violation 484 or a named event 492, but, in one embodiment, not a relational event 488. In an embodiment limiting events 496 may be relational events 488 and the relational binary processor employs recursive algorithms to determine a comprehensive set of events. Threshold violations 484 and named events 492 may be isolated events (e.g. identified independent of a relational binary). Alpha events of a relational binary may be either a threshold violation 484 or a named event 492 but, in this embodiment, not a relational event 488. In an embodiment this rule is relaxed to provide the ability to produce a relational cascade. In an embodiment, alpha events may be relational events and the relational binary processor may employ recursive algorithms to determine a comprehensive set of events.
An aggregate failure image component 524 has two collections of failure image component elements 528. The first is a set of failure image component elements 528 that was identified in a specific sequence. The second represents failure image component elements 528 that simply fell within the specified search window (e.g., existence, not sequence is sufficient for aggregation). Aggregatable 532 is one embodiment of a lightweight interface, which allows the analysis objects (536, 540, 544, 548, 552, 556, 560, 564, 568) to participate in the aggregation. The analysis objects include convergent binaries 536, divergent binaries 540, null binaries 544, repeating nulls 548, repeating convergences 552, repeating divergences 556, events 560, missing events 564 and null events 568 may all participate in an aggregate failure image component 528.
The box on the left is the convergence element toolbox 700 which presents the visual elements which may be added to the design surface and therefore to the binary diagram. The shapes represent events that may be added. The three event types available correspond with the event definition classes in
Each pair of events, which has a connecting relationship, represents a single binary definition 590. In the above figure, the following seven binaries:
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- 1. An analogous binary between nasal pressure fall and oxygen fall (736, 772, 740)
- 2. A possible cycling binary between oxygen fall and oxygen rise (740, 773, 748)
- 3. An expected relationship between oxygen floor breech threshold violation and oxygen rise (744, 768, 748)
- 4. An expected relationship between oxygen rise and oxygen fall (748, 770, 740)
- 5. An analogous binary between oxygen rise and nasal pressure rise (748, 774, 752)
- 6. A verify non-existence binary between oxygen fall and pulse rise (740, 771, 756)
- 7. A verify non-existence binary between oxygen fall and pulse fall (740, 769, 760)
This diagram does not represent all of the relationships of each of these events. It is an example of a subset view into the overall convergence model with a focus on sleep apnea. Relationships and elements may be removed from this diagram without removing them from the entire model (i.e., the editor distinguishes between “Remove” which removes the element from the diagram but not the model and “Delete” which removes the element from the diagram and the model [including all other diagrams]). A diagram may be constructed that shows all of the events and relationships, but it would likely be so large and complex as to be unreadable.
The editor will check the diagram for validity before persistence or at the user's request. For example, a relationship without a beta event would invalidate a diagram. An invalid diagram may invalidate the convergence model. It is preferred that a convergence model cannot be persisted into a binary definition set. The editor allows for an invalid state to provide flexibility during diagram construction. Further, if the target binary definition set is associated with failure image component definition sets that are available to the editor, the editor may warn of conflicts with associated models by changes to the diagram. Depending on editor settings, these changes are disallowed, or the changes may be propagated into the failure image component.
Each diagram element may be manipulated in a more detailed way through property editors associated with the element type. The property editors provide access to all editable properties of the associated definition objects such that the editor is sufficient to construct a complete binary definition set. The editor provides for adding text, notes, lines and other visual elements to the diagram to increase human readability and to communicate between users. These additional visual elements have no affect on the binary definition set.
This structure may be understood within the context of the user interface modeled in
A failure image component definition set is associated with, and dependent upon, a specified binary definition set. A failure image component definition set, and therefore a failure image component and all its corresponding diagrams, cannot be created without the specification of a binary definition set. Further the specified binary definition set provides and limits the events and binaries that may be used to create the failure image component diagrams.
This structure may be understood within the context of the user interface in
Failure image component element toolbox 780 in
Zero or more sequences may be specified, but if an element is placed in the sequenced section it is defined as part of a sequence. Elements placed in the non-sequenced section cannot have relationships. Only existence is specified within the overall time-frame specified for the failure image component. The failure image component diagram differs from the binary diagram in that the diagram itself represents an entity—the failure image component definition 650—and is not simply a collection of other entities (e.g., binaries in the case of the binary editor). Removing elements changes the definition of when a failure image component will be identified. All elements added to the failure image component diagram represent an “and” relationship for identification purposes (i.e., all elements and sequences must exist for the failure image component to be identified). In one embodiment, to create “Or” scenarios, multiple failure image component diagrams are created with variation representing the “or” combinations. The editor may check the diagram for validity before persistence or at the user's request. The editor allows for an invalid state to provide flexibility during diagram construction.
Each diagram element may be manipulated in a more detailed way through property editors associated with the element type. The property editors provide access to all editable properties of the associated definition objects such that the editor is sufficient to construct a complete failure image component definition set. The editor provides for adding text, notes, lines and other visual elements to the diagram to increase human readability and to communicate between users. These additional visual elopements have no affect on the failure image component definition set.
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- 1. A reoccurring verification binary 854 between heparin therapy 850 and ptt rise to therapeutic range 858.
- 2. A verify non-existence binary 866 between heparin therapy 850 and pulse rise 862.
- 3. A verify non-existence binary 882 between heparin therapy 850and blood pressure fall 870.
- 4. A verify non-existence binary 886 between heparin therapy 850 and hemoglobin fall 874.
- 5. A verify non-existence binary 890 between heparin therapy 850 and platelet count fall 878.
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- 1. An expected binary 922 between insulin therapy 920 and blood sugar fall 924 to therapeutic range.
- 2. A verify non-existence binary 926 between insulin therapy 920 and blood sugar breech 930.
- 3. A verify non-existence binary 926 between insulin therapy 920 and confusion 928.
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- 1. A reoccurring verification binary 944 between narcotic therapy 940 and pain score fall to therapeutic range (948)
- 2. A verify non-existence binary 952 between narcotic therapy 940 and oxygen fall 956.
- 3. A verify non-existence binary 960 between narcotic therapy 940 and blood pressure fall 961.
- 4. A verify non-existence binary 962 between narcotic therapy 940 and respiratory rate fall 964.
- 5. A verify non-existence binary 966 between narcotic therapy 940 and confusion 967.
Since
Using these basic designations the image of
Two drug treatments are evident in the image, the antibiotics vancomycin 982, designated by its dose on the time line, and levofloxacin 983, similarly designated. Also a rise in IV fluids in the form of normal saline 984 is indicated. All of these treatments come late after the image has long been indicative of a high probability of sepsis. (This delay, which may be detected in real-time by the patient safety processor, suggests poor and ineffective care, which has ignored or otherwise been poorly responsive to the patient safety processor. The processor may be programmed to provide an indication of the quality of the care provided. Time lines, which include the care worker or ward may be provided so that delays may be linked to particular locations or care workers).
The image of the progressive cascade 980 shows the drug treatments components 982, 983 of the image are too late because they appear within the image very late along the cascade 980. The late portions of the image of the cascade 980 also include a very ominous beta comprising a rise in anion gap 985. The addition of this new image component provides a mature image of cascade 980, which is now strongly indicative of a highly fatal stage of septic shock. Other image views may be for example; specific expanded portions of the time lines, specific expanded views of aggregate failure components along the timeline portions, specific groupings of the timelines, overviews of perturbation progression from group to group (an example of this is shown in
TTP is associated with the accumulation of large multimers of Von Willebrand factor, which damages red blood cells and induces extensive micro vessel thrombosis, resulting in confusion, renal failure and microangiopathic anemia, which is associated with sentinel schizocytes that may be detected in the peripheral smear of blood (if the diagnosis is suspected and the test is ordered). Thrombocytopenia, renal failure, and hematuria may appear earlier in this process than with sepsis but these early findings are only an image clue and do not differentiate two MPPCs.
The MPPC suggestive of TTP is generated by the processor 304, with the processor 304 indicating a failure image consistent with the possibility of sepsis and/or TTP and other less likely conditions such as an acute vasculidity. The processor 304 may output non-specific characterizations of the image such as “image consistent with a life threatening acute or sub-acute thrombotic and inflammatory augmentation” and may present a differential diagnosis of the processes that may generate such an image.
Also, as for example upon the detection of a threshold frame or frames, the processor 304 may automatically order the peripheral smear, blood cultures, urine cultures, sputum cultures, chest x-ray, ANA, pancreatic enzymes, renal sediment, and ANCA study to enlarge and fill in the gaps of the image as rapidly as possible. It is the hospital experts who will ultimately decide the cost-effective balance of ordering these tests as defined by the position the tests are ordered along the cascade. If desired, the reports form the chest x-ray may include a section that will appear as a time series (as for example, a step function). The radiologist in the interpretation may enter an indication of pulmonary infiltrate, pulmonary edema, and the like and may indicate worse or better which may result in a step change from the last test. In this manner, the results of studies such as chest x-rays become a source for time series rendering and incorporation into the failure imaging process.
The presence of an image that includes image components defining a failure cascade 139 that includes inflammatory—hemodynamic respiratory—augmentation (IHRA) 140 with an early fall in platelet count 142, a fall in the ventilation oximetry index (VIO) 144, a fall or threshold value of hemoglobin 146, an rise or threshold value of a confusion score 148, and/or a rise or threshold value of red blood cells in the urine 150, and/or a rise or threshold value of creatinine 152. Together the combination of image components produces a MPPC suggestive of the possibility of TTP and/or sepsis and/or other less common processes. For example, if the patient had just received blood it would suggest a possible transfusion reaction.
The processor 304 may indicate to the healthcare worker the gravity of the image, a differential diagnosis as suggested by the image, the general type and/or physiologic description of failure cascade present, as well as a notification that the detection by the patient safety processor of this type of image may lead to prompt notification of the attending physician and transfer to ICU. If the image has insufficient binaries because results are not available to define enough beta components to define the presence of the failure image suggestive of TTP with a sufficient confidence level to take action, the unavailable tests are ordered upon the detection of the partial image in an attempt to complete the image. Note in
In certain embodiments, human delay in physically following the orders of the patient safety processor may be addressed by building escalating alarms into the processor 304. The time in carrying out the order is determined by the processor 304, and the processor 304 may be programmed to up-indicate the warning upon increasing delay. To prevent this delay, the processor 304 may be programmed notify another station if action is not taken in response to detection of various evolving failure images such as the one in
Rather than, or in combination with, an index, if desired the processor 304 may be programmed to provide an indication of the severity and number of the aggregate perturbations in each group. These may be for example designated by many enlarging or colored arrows, other icons, and/or timed instability scores, to name a few. Many such options may be included so that the user may define his or her preference to visualize the sequence and patterns of cascade progression across groups.
A range of expert and pattern recognition systems may be applied to analyze the images and the image components generated by the failure image processor. These comprise the image identification processor. In one embodiment the image identification processor works with the failure image editor, which allows the user to select the images for detection using for example from a drag and drop interface. In an embodiment the drag and drop interface provides for the discretionary selection of, for example, the time-series type to be selected, then the events and binaries are selected on each time-series type in order and the ranges of relative positions and orders of the events and binaries is selected. In this example, the failure image editor allows customization of the desired ranges for the components of the images (and therefore the ranges of the images themselves) to be selected as well as the response of the image identification processor to the detection of a given image and/or images. The failure image editor may allow for selecting the ranges of timing and order of the events and binaries to generate a specific output such as a proposed diagnosis, warning, order for more testing or imitation or termination of treatment. The image identification processor may also be adaptive such that a physician inputs the diagnosis present, such as for example septic shock, with a given image. The physician may also capture a given image or set of images into the failure image editor to then select ranges about the events and binaries within the image which also would have indicated the presence of septic shock so that the adaptive image processor may learn more quickly.
In one embodiment researchers work from the top down to define failure images. Researchers begin by selecting a set of channels in which they want to “paint” the failure image.
The entire image or sections of the image may then be persisted as an aggregate failure mode. The failure image editor works in concert with the aggregate failure mode editor to create and modify failure image definition sets. Furthermore, the aggregate failure mode editor works in concert with both the convergence editor and the event editor to create and modify the binary and event definition sets. In
In one embodiment researchers work from the bottom up to define failures from a set of time series. Researchers may begin with a set of actual time series from patients diagnosed with known failures, with a set of time series generated by the processor to simulate certain conditions or a set of time series simulating no perturbation at all within a patient. This set of time series may be designated as immutable (for example with the set of actual time series) or may be edited to provide a sample of the patterns being defined. Researchers may select portions of the time series which the failure image editor then will analyze to provide candidate event definitions. Alternatively the researcher may select parameters to define an event and the time series displayed will indicate the results of that definition overlaid on top of the time series to provide visual guidance to the researcher. Once the researcher completes the definition of an event the failure image editor will compare that definition with other definitions within the same channel. If similar patterns are found the researcher is alerted and allowed to create a new event type or select one of the event types already selected. If the event is a relational event, the researcher may select a corresponding event from which relational parameters may be defined and experimented with or the researcher may simply define a function (e.g., >2×relative magnitude). Once an event has been fully defined then the researcher may choose to relate the event to another event within the image or to a search window within the image (e.g., to indicate a missing or null event). The researcher may indicate that a processor-ordered event as the beta of a relational binary. Groups of events and relational binaries may then be selected to define an aggregate failure mode.
In one embodiment, the failure image editor may be presented with a large collection of time series sets provided with the indication of the presence or absence of a particular known failure image. The failure image editor creates a set of candidate definition sets refining them to create the right specificity and sensitively to match the sample set. Once the best-fit definition sets are created, a second large collection of times series sets are provided with the indication of the presence or absence of a particular know failure image. The failure image editor first uses the candidate definition set, determining sensitivity and specificity, and then refines the definition set to be better suited if possible to both the first and the second collection of sample data. This process may be executed iteratively until a best-fit set of definition sets is created or the process is deemed not to be asymptotic and is abandoned.
In one embodiment the failure image may be “played” or executed by the image editor as a MPPC to provide further time-specific markers. A default execution of a failure image is “played” by placing all events as specified in their default (e.g., midpoint) location within their respective search windows as defined by the image definition. A sample result of this is displayed in
In an alternate and/or complimentary embodiment, the image editor provides the ability to split the execution of an image into multiple intermediate and/or end states. Each different branch within the failure image definition may be defined as a state within a failure image or a different, albeit related, failure image. Trees of related images may be composed to provide alternative evolutions of failure within the failure image definition.
Since the stroke caused the SIADH (which cased the fall in serum sodium), the actual modes of failure were significantly different than suspected by the hospitalist in this case. Referring again to
Now referring to
The processor 304, as applied to the disclosed embodiments, is not constrained by the exemplary definitions provided herein, but may rather compare actual data to a plurality of MPPC images (stored or real-time) and image states to find best-fit matches. In one embodiment, the best-fit matches may be determined by image registration techniques. In embodiments, the matches may be made by image similarity measures that include cross-correlation, mutual information, sum of squared intensity differences, and ratio image uniformity. The processor 304 may indicate all possible images and image states ranked by level of confidence. For example the processor 304 may indicate that a MPPC is consistent the systemic inflammatory response syndrome with a high degree of confidence and early septic shock with a medium degree of confidence and that TTP (and other potential alternatives) or overlapping failure modes are remotely possible in view of the image and remain to be excluded. The physician may be asked if it is desired to order the focused testing to exclude these remote alternatives or overlaps and/or the processor may be programmed to automatically add this testing based on a specific range of images (as defined, for example, using the drag-and-drop editor discussed previously).
The identification of failure within the processor 304 is not the single selection of a failure mode or a failure state, but the ranking of a set of images with regard to their fit within the data presented. The identification of multiple failure images is not simply the selection of alternatives. Multiple failures may, in fact, exist and be interacting with each other. Early states of some failure images may be very similar, or in fact exactly the same, as the early stages of other failure images or of a combination of failure images. The processor 304 provides the analysis and visualizations that may allow the health worker to understand the current state of the patient (and patient environment) in terms of possible future states—alternatives and candidate overlaps—along with confidence levels as to their specification. Further, the processor 304 allows the health care worker to query the patient's condition with regard to confidence levels and, in particular, the comparative confidence level between two images and/or image states. For example, the confidence level for sepsis is low with the frame shown in
In one embodiment, the processor 304 may be trained by a pathophysiological engine (such as a human simulator, as is known in the art) for the creation of failure and response images. Given a specified event definition set and binary definition set, the patent safety processor provides a dynamic image derived from the input of the pathophysiologic engine and the processor is instructed as to the nature of the images so that when these images are detected in the future they are recognized. In one embodiment, a human simulator is connected to the patient safety processor to provide an improved teaching tool for healthcare workers. Researchers may select to be presented with a normal, unperturbed patient with various conditions. Once a dynamic image of the patient is displayed researchers may introduce perturbation into the pathophysiological engine which will result in new dynamic images from the processor 304. For example, a research may select relationships presented according to a convergence and toggle them to divergence. Also, random divergence may be configured into the system. Divergence with respect to a single or a set of response system(s) may be specified to model the breakdown of systemic response. Divergence may be configure globally or for a specific timeframe indicating that systemic response fails, or is delayed. In this way, both perturbation and failure of systemic response may be selectively introduced to create failure images. These failure images may be persisted to be further edited within the failure image editor. The researcher may select several different variations and save them as failures and/or failure states. These failures and/or failure states may be persisted within a failure component definition set to be used by the failure image processor. Further, resultant failure images may be compared with actual patient data to refine event and binary definition sets.
Alternately or in combination, according to one embodiment, an MPPC from the processor 304 may be simulated by a processor driving the human simulator so that healthcare workers may observe the reanimation of the MPPC of the patient safety processor either as a digital animation or as a reanimation derived from output of a human manikin. One utilization of the embodiment that combines the pathophysiological engine to the processor 304 is to model treatment protocols. The engine may output expected or unexpected parameters (divergence) in response to treatment and the image output of the patient safety processor may be observed, and/or recorded for protocol modeling. Further, using the ability to introduce divergence, allows processed protocols or other protocols to be verified for reasonable redundancy to cover failures of systemic response.
This aggregation of data, analysis and metadata provide the source of data for the patient safety visualization processor 372. In one embodiment, the patient safety visualization process 372 provides a visualization of a patient's condition in a comprehensive grouping defined by rows of timelines of specific signals and/or grouping and/or categories of signals and/or signals. In one embodiment the global state of each row is represented by color in a spectrum with a different color for each of: sustained stability, stability, convergence, perturbation, divergence, null, failure, cascading failure.
In another embodiment colored arrows, icons, text, and/or other visual representations along each time line represent these states. In one embodiment the patient safety visualization processor represents the patient condition as a set of pixel streams moving from left to right to show evolution of condition over time. The processor provides the navigation backward and forward in time as well as up and down through levels of analysis within the patient safety image database 368. In an embodiment the levels of analysis may be, for example:
Time Series—Unanalyzed data streams in the form of time series
Events and Perturbation—Events and threshold violations characterized within their respective channels as to whether they represent clearly defined perturbation according to the event definition set 332
Systemic Response—Convergent, divergent and null binaries representing the relationships between events, threshold violations, perturbations and expected elements according to the binary definition set 344
Failure—aggregate failure objects representing images of failure that have been identified within a single patient
System Failure—aggregate failure objects within a specific category (such as the respiratory system) representing images of failure that have been identified within a single patient
Failure Patterns—Trends of failure and failure images within patient population or a specific region, such as a specific hospital ward for example.
In one embodiment the patient safety visualization processor 372 composes an image on computer monitor (the patient safety console 384), which is composed by a series of pixels oriented horizontally representing data and analysis streams. These pixel streams are stacked vertically with the position on the x-axis representing a specific point in time. The processor provides for the movement of the pixel streams horizontally to provide a pan through time. Each pixel stream is composed of a set of pixels, which indicate the state of the data and/or analysis at the specified point in time. The pixel has a state (e.g., represented by color) and granularity (the length of time it represents [for example 1 minute]). The size of the view as well as the selected span of time determines the granularity of the pixel. In an embodiment, the pixel is displayed by the highest level of instability found within the time span represented by the single pixel within the pixel stream.
Further, each pixel has a level of abstraction, which determines which objects from the patient safety image database 368 contribute to its state. The contributing objects are shown below by level of analysis:
-
- Time Series—data points within the channel (e.g., oxygen saturation values)
- Events and Perturbation—Events and threshold violations
- Systemic Response—Relational Binaries
- Failure—Aggregate Failure Objects
- Failure Patterns—Failure Trends and Correlations
In an embodiment, groups of pixel streams are stacked vertically to create a patient safety visualization. Patient safety visualizations may be composed of pixel streams of different patients or of data and analysis streams within a single patient. Patient safety images provide the ability of the care worker to filter the analysis quickly to identify problem areas or areas of a specific nature. Sorting may be provided highlight emerging failure cascades or other pattern failures.
In an embodiment patient safety images may be composed of different levels of analysis displayed on the patient safety console 384 at the same time correlated by time. The use of mixed-analysis level visualizations provides the careworker with the ability to quickly understand the relationship between the lower levels of data (e.g., incomplete recovery within oximetry) and the higher levels of analysis (e.g., the identification of narcotic-induced ventilation instability).
In an embodiment the patient safety console 384 provides the user the ability to trace a failure condition back to the earliest events associated with the failure to provide a visual display of a failure cascade. Alternatively, individual events and threshold violations may be selected to identify which higher-level objects in which they played a part. In other words, low-level events may be traced forward to understand their relationship within evolving patient instability. This tracing, both backward and forward, is provided by the fact that alpha events of a relational binary are often the beta event of a preceding relational binary. This chain of relational binaries provides a powerful tool of analysis. The patient safety visualization processor provides the ability to isolate these binary chains showing their origin, evolution and resolution. In one embodiment, visualizations may be filtered by the existence and character of binary chains.
In one embodiment, and if selected by configuration, the patient safety visualization processor provides the ability to navigate into the metadata models at any point within the visualization. Event, convergence and failure image component diagrams are accessible from objects, which were composed using specified elements within these diagrams within the event definition set 332, binary definition set 344 and failure image component definition set 356. Navigation into the metadata models provides expert care workers and researchers the ability to further understand and/or alter the analysis.
The patient safety console 384 presents a complex set of data and analysis that meets the immediate need of the busy care worker. In one embodiment, analysis at the highest levels may be collapsed into a single pixel stream or group of pixel streams per patient that provides a simple representation of the evolution of overall patient safety. Within and from that pixel stream the care worker may drill down into the most complex displays: multiple levels of analysis, binary chains and metadata models to name a few. Alternatively this drill down may be provided by for example mouse over, touch screen, or may appear automatically when the processor detects certain adverse patterns or thresholds.
In one embodiment, the object stream visualization focuses on the relationships and cascading of the onset of perturbation within the patient. This is an alternate, and complimentary, view to the pixel streams described above which focus to a greater extent on the state of discrete elements within the system at various levels of analysis. These two visualizations may be used in parallel and/or provide navigation between them.
In an embodiment, the object stream visualization represents events and threshold violations as icons along a time series in which the icon is placed at the first point in time in which the event or threshold violation occurred. Icons indicate their character by color, size and decorations. The basic icon is an arrow pointing either up or down (as in
Decorations on the arrow may be presented to provide visual cues as to the nature of the event. A line underneath the head of the arrow indicates that he event that occurred was a threshold violation. A circle around the arrow (see 979 of
In one embodiment, the patient safety visualization processor 372 will provide automated visual navigation for a specified period of time and/or specified images. This automated visual navigation acts as an analysis-driven video playback of the selected period of time. The healthcare worker selects “Play” and allows the patient safety visualization processor to move visually through the evolution of a specified condition. The healthcare worker may choose navigation movements including “Play”, “Pause”, “Fast-Forward”, “Rewind”, “Skip Forward”, “Skip Backward”, to name a few. In an embodiment, during Play mode the patient safety visualization processor moves at different speeds through the automated visualization depending on the severity of the condition being displayed. If the timeseries being displayed have little perturbation (or little perturbation related to the specified failure cascade) the processor will move very quickly through time (i.e., from left to right). When an area of interest, as determined by the processor, comes into vision the patient safety visualization processor will slow the movement from left to right. Further, the patient safety visualization processor will highlight elements that indicate, clarify and specify the evolution and/or cascade of failure as well as their relationships with other elements. The patient safety visualization processor will further display translucent pop-up panels that provide further textual and/or visualization elements to describe the current view and elements within the current view. At any point, the healthcare worker may “Pause” the automated visual navigation to review the displayed data and/or drill into what has been displayed.
In an embodiment, the healthcare worker may select from a summary view a timespan to review and also indicate sections of the timespan for which they are interested. The patient safety visualization processor will slow for the areas selected that are of interest and will increase the textual and visualization display appropriately for the highlighted sections.
In one embodiment the patient safety visualization processor 304 selects the object streams to display and may include or remove streams as they become important in the video navigation. The healthcare worker may choose to include additional streams or to “pin” streams so as to make them always available in the video navigation. Missing streams are also indicated.
The patient safety visualization processor 372 may further indicate to the healthcare worker the time estimated for automated visual navigation (e.g., “Standard visual navigation estimated at 2 minutes and 37 seconds”). The patient safety visualization processor may include audio and visual elements corresponding to and synchronized with the timeseries data along with timeseries data if video and audio feeds are available. In an embodiment, healthcare workers may include audio and/or video comments into the data streams to communicated and collaborate regarding elements displayed within the patient safety visualization processor. The patient safety visualization processor may be directed to include all or a specified subset (e.g., “Include Comments from Doctor X”) of these elements within the automated visual navigation or may be directed simply to indicate their presence such that the healthcare worker may invoke them as needed.
In an embodiment, the patient safety visualization processor 372 may “record” an automated visual navigation session into a non-interactive video format which may be viewed on standard video equipment, with streaming technology or in a standard media player such that automated visual navigation sessions may be shared with healthcare workers who do not have access to the patient safety image database or the patient safety visualization processor (e.g., as an attachment to an e-mail or accessed from a video-enabled phone).
In one embodiment, the processor 304 may use an archive or database of retrospective and/or theoretical model MPPCs as a source for determining best-fit image matches or as an ongoing model to improve such matches. As shown in
The bandwidth of the MPPC may include tests, historic data, and treatments that become objects in the MPPC. When potentially clinically significant images of perturbation are identified in an MPPC, the patient safety processor is programmed to quickly broaden the bandwidth to investigate the alternative causes. This is important because the longer the duration an undetected failure mode the greater the increase in cost and mortality because complications develop with widen the cascade and make salvage more expensive and difficult. A narrow bandwidth (fewer tests) is, on the other hand (without considering the cost of allowing a longer duration of failure), less expensive than a broader bandwidth. The “effective bandwidth” includes those components of the bandwidth that actually contribute to characterize the factors actively defining the failure image components of the MPPC. Poorly conceived testing and treatment increases the bandwidth and the medical cost but may not increase the effective bandwidth. One object of the patient safety processors 2314 is to increase the effective bandwidth as rapidly as possible without broadening the bandwidth inordinately. In an embodiment, a patient safety processor medical system monitors with a few monitors and tests but uses these as sentinels, increasing the number of monitors and tests automatically if a MPPC begins.
Therefore, it may be advantageous to provide a mechanism to automatically increase the effective bandwidth of the MPPC at any time (for example, during low staff times in a rural hospital), to optimally shorten the duration of failure without the application of a continuously wide and expensive bandwidth. One mechanism to broaden bandwidth is with improved testing, such as focused tests that have a high sensitivity and specificity for a specific failure mode. The MPPC archive 2316 of the patient safety processor network 2300 may be examined for opportunities to increase the motion picture bandwidth and achieving a balanced mechanism for mortality and cost reduction by shortening the duration of failure through earlier detection and improved treatment response.
As discussed, according to one embodiment the patient safety processing network includes a set of local patient safety processors located at a hospital ward or unit. The local patient safety processor is under the direction of the healthcare workers at that location. This allows the local healthcare workers to control the treatment and testing protocols, and variation of the testing bandwidth, deployed for the patient under their control. The local attending physicians individually or as a group as well as the hospital pharmacists and nurses may prescribe these protocols though the use of the Local patient safety processors. The local patient safety processor records the healthcare worker(s) (for example as a step time series of with an rise event occurring when the physician, or nurse for example assumes responsibility and a fall event when he or she is replaced by another. Those caring for the patient are therefore part of the MPPC. Protocols may be decided by a group or by an individual physician caring for the patient. The extent to which a particular healthcare worker or group is statistically or otherwise associated with favorable or unfavorable MPPC may be assessed by the processor. The protocol choices for the local patient safety processors may be made through the use of pre prepared MPPC protocols as previously discussed.
The local patient safety processor may recognize the physician time-series and adjust the protocols and MPPC to match those selected by this physician. The physician may override the patient safety processor and if this occurs this override is an event rendering a new time series until the override is withdrawn. The extent to which a particular override is statistically or otherwise associated with favorable or unfavorable MPPC may be assessed by the hospital patient safety processor, the hospital group patient safety processor, or the database processor 18. These may provide modifications in future protocols, and even incorporation of the modification of the override or even the prevention of this type of override may be made accordingly.
The local patient safety processor s communicate with a hospital wide or hospital patient safety processor which is preferably under direction of the quality improvement committee and the hospital experts in each field. The hospital patient safety processor communicates with all the local patient safety processor s and may be used to upload treatment/and or testing and/or bandwidth adjustment protocols and or comparison MPPC, which have been agreed upon for application hospital-wide to the local patient safety processors.
The hospital patient safety processor s of single hospitals communicate with (and may be controlled by) central organization patient safety processor. The organization patient safety processor allows standardization of the hospital protocols through the Hospital patient safety processor s under its control to set a minimum safety treatment and testing standards and may be controlled by a centralized quality assurance group with expert representatives form all of the hospitals. Since the individuals caring for the patient represent at least one time series and the ward represents at least one time series and the hospital represents at least one time series and the organization represents at least one time series. The MMPP therefore includes all of these locations. If the Patient is wearing a monitored GPS unit this may comprise a location time series which provides continuous real time location as part of the MMPP. The patient safety processor s will compare with the entered locations to identity convergence.
One embodiment demonstrates an example of how a new set of time series derived from testing devices and provided to the patient safety processor may be evaluated for cost effectiveness. In this example, a pulse oximetry reflectance probe is mounted (as by hat or headband or other fixation device above at least eye to the patient's head and the probe is wirelessly or otherwise connected to pulse oximeter and the local patient safety processor (as by Bluetooth for example). The transmitter may be mounted in the probe, on the headband or hat or behind the ear in the position of a hearing aid if desired. A position sensor may also be provided mounted on the patient. A maneuver such as a change in body position may be detected and included as an event by the patient safety processor and a fall a component of the photoplethysmographic pulse (indicative of the perfusion of the capillary bed distribution of the supra-orbital artery, a distal branch of the internal carotid) in relation to a maneuver. In this way the flow of the capillary bed above the eye becomes a surrogate marker of other capillary beds supplied from the internal carotids. Real time perfusion may be compared with that of the ear, fingertip, or the pulse pressure (as by an invasive arterial line for example) to identify disparate in perfusion in one or both of the internal carotid distribution. The local patient safety processor processes the MPPC with these as additional time-series. The local patient safety processor uploads the MPPC to the Hospital patient safety processor, and the hospital patient safety processor, organizational patient safety processor, and/or database processor 18 where the MPPCs may be evaluated to determine if after adjusting for disparities in the MPPCs as a function of co-morbidities. The MPPCs that include the time series derived from the supra-orbital plethysmographic pulse may be associated with a reduction in the number of falls in the hospital. If this is statistically significant, these time series may be automatically added (by automatically ordering the intermittent or continuous supra-orbital monitoring used the study) to increase the testing and bandwidth when it is detected that the MPPC of a given patient is similar to those of the study population where the addition of those processed time-series data had a positive impact on outcome.
The database processor 18 is preferably connected to all the organization patient safety processor s (or hospital patient safety processor s if the hospital is not under a central organization). The database processor 18 is preferably controlled by a healthcare information corporation which maintains the database processor 18 and the network. Each patient safety processor below the database processor 18 is capable of operating independent of the patient safety processor network so extensive redundancy, lack of subordinate dependency, and therefore greater safety against network failure is built into the patient safety processor network.
This patient safety processor network structure allows diverse minimum standards to be set by each government and allows the monitoring of the effects of these diverse minimum standards to determine cost and benefit. The database processor 18 preferably includes a comparison processor that compares the MPPC and all of the objects of the MPPC, such as events, binaries, image components, and cascades, to other MPPCs all of the objects of the other MPPCs to identify statically differences between the MPPC which are associated with improved or adverse cost, outcome, length of stay, morbidity, mortality, resource consumption, and/or complications. One advantage of the patient safety processor is that the objects of the MPPC are discrete and are therefore readily incorporated into statistical software components of the PSCP. The statistical software components may include a wide array of statistical software products as are well known in the art for identifying differences in discrete time related data collections. The objects also comprise organized collections of an ascending hierarchy of complexity and the organized collections which may be compared statistically at each ascending level of complexity to identify associated differences. In one embodiment the PSCP divides the MPPCs into groups having a least apportion of substantially the same image components. For example a grouping may be derived having substantially the same initial sepsis cascade picture and similar co morbidities and age and sex but different physicians, hospitals and/or treatments. Differences in length, progression, compilations and mortality associated with the cascade may be identified and statistically compared with the differences in physicians, hospitals, treatments, testing, and/or treatment timing.
When a particular testing, treatment, bandwidth variation, ward location, or hospital location is identified as statistically associated with improved outcome then the database processor 18 my offer, as for download, new protocols which incorporate those identified particulars into the hospital patient safety processors and/or Organization patient safety processors for their consideration. New medication or treatments may be assessed in this way with blinding of the data accommodated by the patient safety processor such that the time series of the experimental medical is labeled with an experimental code.
While the disclosed embodiments may be susceptible to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and have been described in detail herein. However, it should be understood that the disclosure is not intended to be limited to the particular forms disclosed. Indeed, disclosed embodiments may not only be applied to clinical diagnosis of systems of physiological failure, but may be applied to any clinical condition that may be represented by images as provided herein. Indeed, the disclosed embodiments may be applied to monitor and/or diagnose conditions in which a patient's condition is generally improving, such as post-surgical monitoring. Rather, the disclosure is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the disclosed embodiment and as defined by the following appended claims.
Claims
1. A hospital monitoring system comprising:
- a database comprising an electronic medical record repository of data wherein the electronic medical record repository of data contains the data of a plurality of patients in at least one hospital; and
- a processor programmed with instructions for: searching the database for at least one complex cascade pattern within the data of the plurality of patients and to identify one or more patients generating the at least one complex cascade pattern.
2. The hospital monitoring system of claim 1, comprising an alarm processor programmed with instructions to provide an automatic alarm upon the detection of the complex cascade pattern.
3. The hospital monitoring system of claim 1, wherein the complex cascade pattern comprises a cascade of at least one of sepsis, severe sepsis, septic shock, microcirculatory failure, and shock.
4. The hospital monitoring system of claim 1, wherein the complex cascade pattern comprises at least a plurality of linked perturbations and/or trends of physiologic and laboratory data creating a progressively enlarging aggregation of progressively greater numbers of perturbed physiologic and laboratory data.
5. The hospital monitoring system of claim 1, further programmed to determine at least one characteristic of the complex cascade pattern, the characteristic comprising at least one of a severity of the complex cascade pattern, a duration of the complex cascade pattern, a time of onset of the complex cascade pattern, a maturity of the complex cascade pattern, a timing relationship of the complex cascade pattern to other events or another complex cascade pattern, a cost associated with the complex cascade pattern, a global pattern of the complex cascade pattern, a time of termination of the complex cascade pattern, components of the complex cascade pattern, a state of evolution of the complex cascade pattern, a length of stay subsequent to, or in association with the complex cascade pattern, or treatments associated with the complex cascade pattern.
6. The hospital monitoring system of claim 5, wherein the at least one characteristic of the complex cascade pattern is defined by at least one of a number of perturbations and/or trends which comprise the complex cascade pattern, a severity of the perturbations and/or trends, a number of systems affected by the complex cascade pattern, a presence, number and/or severity of failure of compensation in response to perturbations associated with the complex cascade pattern.
7. The hospital monitoring system of claim 1, wherein the processor comprises instructions for determining a rate of growth of the complex cascade pattern.
8. The hospital monitoring system of claim 1, wherein the processor comprises instructions for determining the rate of growth of the complex cascade pattern by at least one of the increase in number and/or severity of new perturbations being added per unit time, the increase number of systems affected, and the increase number of perturbations present in different systems.
9. The hospital monitoring system of claim 1, wherein the processor comprises instructions for detecting events or components that are temporally and/or spatially associated with the complex cascade pattern but that are not part of the complex cascade pattern.
10. The hospital monitoring system of claim 1, wherein the processor comprises instructions for converting the electronic medical records into a format favorable for searching for the complex cascade pattern.
11. The hospital monitoring system of claim 10, wherein the format comprises sequential and timed variations comprised of at least positive variations and negative variations of the data.
12. The hospital monitoring system of claim 10, wherein the electronic medical record repository of data comprises data from a plurality hospitals, and wherein the processor is programmed comprises instructions for identifying the patients that are generating complex cascade patterns and the hospital in which they are located.
13. A patient data processing system comprising a processor programmed to:
- convert the electronic medical records of at least one hospital into sequential and timed trends comprised of at least positive trends and negative trends of both the physiologic parameters and the laboratory data,
- detect relational trends comprised of a combination of positive and/or negative trends,
- detect complex cascade patterns comprised of a plurality of combinations of relational trends,
- automatically output a display of the image of the detected complex cascade,
- automatically output a warning indicating the detection of the complex cascade and the identification of the patient generating the complex cascade,
- track the growth or decline of the complex cascade and output an indication indicative of growth or decline.
14. The patient data processing system of claim 13, wherein the complex cascade pattern is indicative of physiologic failure.
15. The patient data processing system of claim 13, wherein the physiologic failure is at least one of sepsis, severe sepsis, septic shock, and microcirculatory failure, a shock cascade, and a septic shock cascade.
16. The patient data processing system of claim 13, wherein the processor comprises instructions for to determining and outputting an indication of the type of the cascade detected.
17. The patient data processing system of claim 13, wherein the processor comprises instructions for to determining and outputting at least an indication of the timing and type of the trends along the cascade.
18. The patient data processing system of claim 13, wherein the processor comprises instructions for to determining and outputting at least an indication of the length of the cascade.
19. The patient data processing system of claim 13, wherein the processor comprises instructions for to detecting the onset of therapy determining and outputting at least an indication of timing of therapy in relation to the cascade.
20. A patient data processing system for processing electronic medical records of a hospital, comprising a processor programmed to:
- generate a time-series of data of at least a portion of a plurality of patients in the hospital, including at least data relating to the physiologic state and/or care of each patient;
- convert the datasets, including at least the monitored datasets and laboratory datasets into parallel and overlapping time series;
- identify occurrences comprising inflammatory occurrences, metabolic occurrences, volumetric occurrences, hemodynamic occurrences, therapy occurrences, hematologic occurrences, or respiratory occurrences;
- identify the timing of the occurrences;
- identify at least one relational pattern of occurrences along a plurality of time series that is indicative of failure cascade of at least one of a sepsis cascade, a pulmonary embolism cascade, a metabolic cascade, or a microcirculatory failure cascade; and
- output an alarm when the failure cascade is detected.
Type: Application
Filed: May 7, 2009
Publication Date: Nov 12, 2009
Applicant: (Columbus, OH)
Inventors: Lawrence A. Lynn (Columbus, OH), Eric N. Lynn (Villa Ridge, MO)
Application Number: 12/437,385
International Classification: G06Q 50/00 (20060101);
