Patents by Inventor Paul Stanley Addison

Paul Stanley Addison has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9649071
    Abstract: According to embodiments, systems and methods for high-pass filtering a plethysmograph or photoplethysmograph (PPG) signal are disclosed. A sensor or probe may be used to obtain a plethysmograph or PPG signal from a subject. The sensor may be placed at any suitable location on the body, e.g., the forehead, finger, or toe. The PPG signal generated by the sensor may be high-pass filtered to disambiguate certain features of the PPG signal, including one or more characteristic points. The cut-off frequency for the high-pass filter may be greater than 0.75 Hz and less than 15 Hz. The cut-off frequency for the high-pass filter may be selected to be greater than the subject's computed pulse rate. These characteristic points on the filtered PPG signal may be used to compute non-invasive blood pressure measurements continuously or on a periodic basis. For example, the time difference between two or more characteristic points in a high-pass filtered version of the generated PPG signal may be computed.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: May 16, 2017
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: James N. Watson, Paul Stanley Addison
  • Publication number: 20170105672
    Abstract: A system configured to monitor autoregulation includes a medical sensor configured to be applied to a patient and to generate a regional oxygen saturation signal. The system includes a controller having a processor configured to receive the regional oxygen saturation signal and a blood pressure signal and to determine a cerebral oximetry index (COx) based on the blood pressure signal and the regional oxygen saturation signal. The processor is also configured to apply a data clustering algorithm to cluster COx data points over a range of blood pressures, identify a first cluster of COx data points that corresponds to an intact autoregulation zone for the patient, and provide a first output indicative of the intact autoregulation zone for the patient.
    Type: Application
    Filed: October 14, 2016
    Publication date: April 20, 2017
    Inventors: Paul Stanley Addison, James N. Watson, Dean Montgomery
  • Publication number: 20170105631
    Abstract: A method for monitoring autoregulation includes, using a processor, using a processor to execute one or more routines on a memory. The one or more routines include receiving one or more physiological signals from a patient, determining a correlation-based measure indicative of the patient's autoregulation based on the one or more physiological signals, and generating an autoregulation profile of the patient based on autoregulation index values of the correlation-based measure. The autoregulation profile includes the autoregulation index values sorted into bins corresponding to different blood pressure ranges. The one or more routines also include designating a blood pressure range encompassing one or more of the bins as a blood pressure safe zone indicative of intact regulation and providing a signal to a display to display the autoregulation profile and a first indicator of the blood pressure safe zone.
    Type: Application
    Filed: October 18, 2016
    Publication date: April 20, 2017
    Inventors: Paul Stanley Addison, James N. Watson, Dean Montgomery
  • Patent number: 9615781
    Abstract: During patient monitoring, a depth of consciousness (DOC) measure, such as a bispectral index, may be used in conjunction with additional information obtained from an awareness metric derived from one or more physiological signals, such as a photoplethysmograph signal. In an embodiment, a DOC measure may be combined with information from an awareness metric to produce a combined DOC measure. In an embodiment, information from an awareness metric derived from one or more physiological signals may be used to provide an indication of confidence in a DOC measure. In an embodiment, a DOC measure may be used to provide an indication of confidence in a depth of consciousness assessment based on an awareness metric. In an embodiment, one or the other of a DOC measure and an awareness metric may be used to provide an indication of a patient's depth of consciousness (e.g., by one “overriding” the other).
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: April 11, 2017
    Assignee: COVIDIEN LP
    Inventors: Edward M. McKenna, Bo Chen, Youzhi Li, Paul Stanley Addison, James N. Watson
  • Publication number: 20170095161
    Abstract: A method for monitoring autoregulation includes, using a processor, receiving a blood pressure signal an oxygen saturation signal, and a regional oxygen saturation signal from a patient. The method also includes normalizing the regional oxygen saturation signal to correct for variation in the oxygen saturation signal based on a relationship between the oxygen saturation signal and the regional oxygen saturation signal. The method further includes determining a linear correlation between the blood pressure signal and the normalized regional oxygen saturation signal. The method still further includes providing a signal indicative of the patient's autoregulation status to an output device based on the linear correlation.
    Type: Application
    Filed: October 5, 2016
    Publication date: April 6, 2017
    Inventors: Paul Stanley Addison, James N. Watson, Dean Montgomery
  • Publication number: 20170069188
    Abstract: A method for reducing alarm fatigue, specifically, combining multiple physiological parameters, such as heart rate and respiratory rate, into one index number indicative of the patient's condition. The method includes detecting the severity of the patient's condition, generating, and displaying a scaled version of that index number relative to the severity of the patient's condition. The scaled index number is displayed on a patient monitor device. The scaled index number may have a size and color value.
    Type: Application
    Filed: September 9, 2015
    Publication date: March 9, 2017
    Inventors: Paul Stanley Addison, James N. Watson
  • Patent number: 9560995
    Abstract: A physiological monitoring system may determine a probe-off condition. A physiological sensor may receive a light signal including one or more wavelengths of light. The received light signal may be processed to obtain a light signal corresponding to an ambient light signal and a light signal corresponding to an emitted light signal and the ambient light signal. The signals may be analyzed to identify an inverse effect. The system may determine whether the physiological sensor is properly positioned based on the identification of an inverse effect.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: February 7, 2017
    Assignee: Covidien LP
    Inventors: Paul Stanley Addison, James Nicholas Watson
  • Patent number: 9554712
    Abstract: A test unit may generate a pulse signal based on a pulsatile profile and a frequency modulation component of a respiratory profile. A respiration modulated signal may be generated from the pulse signal, an amplitude modulation component, and a baseline modulation component. A patient modulated signal may be generated based on the respiration modulated signal and a patient profile. The artificial PPG signal may be generated based on the patient modulated signal and an artifact profile. The artificial PPG signal may be output to an electronic device.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: January 31, 2017
    Assignee: Covidien LP
    Inventors: Braddon M. Van Slyke, Ronald Kadlec, Scott McGonigle, Michael Mestek, Paul Stanley Addison, James Nicholas Watson
  • Publication number: 20160302737
    Abstract: Systems and methods for detecting the occurrence of events from a signal are provided. A signal processing system may analyze baseline changes and changes in signal characteristics to detect events from a signal. The system may also detect events by analyzing energy parameters and artifacts in a scalogram of the signal. Further, the system may detect events by analyzing both the signal and its corresponding scalogram.
    Type: Application
    Filed: June 24, 2016
    Publication date: October 20, 2016
    Inventors: James Nicholas Watson, Paul Stanley Addison
  • Patent number: 9462976
    Abstract: A physiological monitoring system may determine a probe-off condition. A physiological sensor may be used to emit one or more wavelengths of light. A received light signal may be processed to obtain a light signal corresponding to the emitted light and an ambient signal. The signals may be analyzed to identify similar behavior. The system may determine whether the physiological sensor is properly positioned based on the analysis.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: October 11, 2016
    Assignee: Covidien LP
    Inventors: Paul Stanley Addison, James Nicholas Watson
  • Patent number: 9451887
    Abstract: Systems and methods are disclosed herein for measuring the electromechanical delay of the heart of a patient. An electrocardiogram (EKG) signal may be used to detect heart electrical activity. Photoplethysmograph (PPG) signals may be used to detect heart mechanical activity. The electromechanical delay may be calculated based at least in part on the timing of an EKG signal and at least two PPG signals.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: September 27, 2016
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: James N. Watson, Paul Stanley Addison, Robert Stoughton
  • Publication number: 20160262640
    Abstract: Systems and methods are provided for storing event markers. The value of a monitored physiological metric may be monitored and compared to a reference value. A patient monitoring system may compute a difference between a monitored metric and a reference value, and compare the difference to a threshold value to determine whether a physiological event has occurred. Based on the determination, a patient monitoring system may store an event marker, trigger a response, update a metric value, or perform any other suitable function.
    Type: Application
    Filed: May 24, 2016
    Publication date: September 15, 2016
    Inventors: James N. Watson, Paul Stanley Addison, Rakesh Sethi, Keith Manning
  • Patent number: 9402573
    Abstract: A system is configured to determine a fluid responsiveness index of a patient from a physiological signal. The system may include a sensor configured to be secured to an anatomical portion of the patient, and a monitor operatively connected to the sensor. The sensor is configured to sense a physiological characteristic of the patient. The monitor is configured to receive a physiological signal from the sensor. The monitor may include an index-determining module configured to determine the fluid responsiveness index through formation of a ratio of one or both of amplitude or frequency modulation of the physiological signal to baseline modulation of the physiological signal.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: August 2, 2016
    Assignee: Covidien LP
    Inventors: Mark Su, James Nicholas Watson, Paul Stanley Addison
  • Publication number: 20160198963
    Abstract: Systems and methods are provided for storing and recalling metrics associated with physiological signals. It may be determined that the value of a monitored physiological metric corresponds to a stored value. In such cases, a patient monitor may determine that a calibration is not desired. In some cases, a patient monitor may recall calibration parameters associated with the stored value if it determined that the stored value corresponds to the monitored metric value.
    Type: Application
    Filed: March 21, 2016
    Publication date: July 14, 2016
    Inventors: Paul Stanley Addison, James N. Watson
  • Patent number: 9378332
    Abstract: Systems and methods for detecting the occurrence of events from a signal are provided. A signal processing system may analyze baseline changes and changes in signal characteristics to detect events from a signal. The system may also detect events by analyzing energy parameters and artifacts in a scalogram of the signal. Further, the system may detect events by analyzing both the signal and its corresponding scalogram.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: June 28, 2016
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: James Nicholas Watson, Paul Stanley Addison
  • Patent number: 9357937
    Abstract: A system for determining stroke volume of an individual. The system includes a skew-determining module that is configured to calculate a first derivative of photoplethysmogram (PPG) signals of the individual. The first derivative forms a derivative waveform. The skew-determining module is configured to determine a skew metric of the first derivative, wherein the skew metric is indicative of a morphology of at least one pulse wave detected from blood flow of the individual in the derivative waveform. The system also includes an analysis module that is configured to determine a stroke volume of the individual. The stroke volume is a function of the skew metric of the first derivative.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: June 7, 2016
    Assignee: Covidien LP
    Inventors: James Nicholas Watson, Paul Stanley Addison
  • Patent number: 9357954
    Abstract: Methods and systems are provided that allow for the simultaneous calculation of pulse and regional blood oxygen saturation. An oximeter system that includes a sensor with a plurality of emitters and detectors may be used to calculate a pulse and/or regional blood oxygen saturation. A plurality of light signals may be emitted from light emitters. A first light signal may be received at a first light detector and a second light signal may be received at a second light detector. A pulse and/or regional blood oxygen saturation value may be calculated based on the received first and/or second light signals. The pulse and regional blood oxygen saturation values may be calculated substantially simultaneously. The calculated pulse and regional blood oxygen saturation values as well as other blood oxygen saturation values may be displayed simultaneously in a preconfigured portion of a display.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: June 7, 2016
    Assignee: Covidien LP
    Inventors: Youzhi Li, Bo Chen, Edward M. McKenna, Paul Stanley Addison
  • Patent number: 9357934
    Abstract: Systems and methods are provided for storing event markers. The value of a monitored physiological metric may be monitored and compared to a reference value. A patient monitoring system may compute a difference between a monitored metric and a reference value, and compare the difference to a threshold value to determine whether a physiological event has occurred. Based on the determination, a patient monitoring system may store an event marker, trigger a response, update a metric value, or perform any other suitable function.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: June 7, 2016
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: James N. Watson, Paul Stanley Addison, Rakesh Sethi, Keith Manning
  • Publication number: 20160106322
    Abstract: A PPG system for determining a stroke volume of a patient includes a PPG sensor configured to be secured to an anatomical portion of the patient. The PPG sensor is configured to sense a physiological characteristic of the patient. The PPG system may include a monitor operatively connected to the PPG sensor. The monitor receives a PPG signal from the PPG sensor. The monitor includes a pulse trending module determining a slope transit time of an upslope of a primary peak of the PPG signal. The pulse trending module determines a stroke volume of the patient as a function of the slope transit time.
    Type: Application
    Filed: December 21, 2015
    Publication date: April 21, 2016
    Inventors: Paul Stanley Addison, James Nicholas Watson
  • Patent number: 9314168
    Abstract: Techniques for detecting sleep events are disclosed. In some embodiments, a continuous non-invasive blood pressure (“CNIBP”) monitoring system may be used to obtain blood pressure values from a subject during a sleep study. Changes in the blood pressure over time may be determined and analyzed in order to identify a sleep event. The localized blood pressure changes may be interpreted in isolation or in combination with other signals collected from the subject.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: April 19, 2016
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: James Nicholas Watson, Rakesh Sethi, Paul Stanley Addison