Abstract: Described herein are systems, devices, and methods to assess and correct for instability of baseline pressure of pressure sensors applied for measuring pressures inside a human body or body cavity, such as intracranial pressure (ICP) and arterial blood pressure (ABP). The present disclosure includes systems for assessing instability of baseline pressure by computing differences in single pressure wave parameters between single pressure waves, calculating pressure stability levels, determining differences between pressure stability levels and creating baseline pressure indicator plots. The baseline pressure indicator plots define instability of baseline pressure as a function of defined thresholds applied to parameters of the pressure stability levels. The disclosure also provides means for correcting mean pressure caused by baseline pressure instability.

Abstract: Described herein are systems, devices, and methods for remote assessment and correction of baseline pressure instability of medical pressure sensors. The present disclosure enables centralized surveillance of baseline pressure instability, which provides a technical solution for manufacturers of pressure sensors and/or pressure transducer systems to monitor the proper function of their products. Moreover, health care personnel are provided with means to assess pressure sensor instability and get corrected pressure scores, neither of which are presently unavailable. The disclosure thereby provides a technical solution to a problem of medical pressure sensors that represents risk of harm to patients.

Abstract: This invention describes a method for processing pressure signals derivable from locations inside or outside a human or animal body or body cavity. Different aspects of the invention relate to a method for optimal differentiating between cardiac beat- and artifact-induced pressure waves, a method for obtaining new and improved information from said pressure signals, a method for obtaining signals predicting pressures inside a body or body cavity from pressure signals outside said body or body cavity. In particular, this invention describes a method for modifying individual continuous non-invasive pressure-related signals into signals highly predictable of the corresponding invasive pressure-related signals based on already established relationships that can be used for formula-based adjustments of individual signals solely obtained by a non-invasive approach.

Abstract: This invention describes a method for processing pressure signals derivable from locations inside or outside a human or animal body or body cavity. A major aspect of the invention relates to a method for determining relationships between different pressure-related signals with the purpose of obtaining signals predicting pressures inside a body or body cavity from pressure signals outside said body or body cavity. According to the invented method different formula-based relationships for specific types of signals and locations and sensor types are determined, which provides for a reference that can be applied on new and individual non-invasive pressure measurements. Thereby continuous pressure-related signals from a non-invasive source may be processed in a way that makes the continuous non-invasive pressure signals highly predictable of the pressures inside the body or body cavity.

Abstract: This invention describes a method for processing pressure signals derivable from locations inside or outside a human or animal body or body cavity. Different aspects of the invention relate to a method for optimal differentiating between cardiac beat- and artifact-induced pressure waves, a method for obtaining new and improved information from said pressure signals. In particular, this invention describes the use of said inventive method for processing of pressure signals for controlling an adjustable shunt valve. The method can be incorporated in a processing unit of a device for use in draining fluid from a brain or spinal fluid cavity.

Abstract: This invention describes a method for processing pressure signals derivable from locations inside or outside a human or animal body or body cavity. Different aspects of the invention relate to a method for optimal differentiating between cardiac beat- and artifact-induced pressure waves, a method for obtaining new and improved information from said pressure signals, a method for obtaining signals predicting pressures inside a body or body cavity from pressure signals outside said body or body cavity. In particular, this invention describes devices for sensing continuous pressures signals and displaying otput of processing according to the inventive methods.

Abstract: This invention describes a method for processing pressure signals derivable from locations inside or outside a human or animal body or body cavity. Different aspects of the invention relate to a method for optimal differentiating between cardiac beat- and artifact-induced pressure waves, a method for obtaining new and improved information from said pressure signals, a method for obtaining signals predicting pressures inside a body or body cavity from pressure signals outside said body or body cavity. In particular, this invention describes a system for sensing continuous pressures signals and displaying output of processing according to the inventive methods.

Abstract: This invention describes methods for processing pressure signals derivable from locations inside or outside a human or animal body or body cavity. The major aspect of the invention relates to methods for obtaining new and improved information from said pressure signals. The analysis output of said method may be presented in a variety of ways such as numerical values; trend plots of numerical values, histogram presentations or as a quantitative matrix, the presentation as a quantitative matrix is highlighted. Thereby completely new information about pressures is obtained. In particular, information about intracranial compliance is derived from the intracranial pressure (ICP) signal itself.

Abstract: A method for analysing pressure-signals derivable from pressure measurements on or in a body of a human being or animal, includes the steps of sampling said signals and converting the signals to pressure-related digital data with a time reference, wherein the method comprises the further steps of: identifying from said digital data features related to absolute pressures relative to atmospheric pressure, recording repeatedly at specific time intervals, intermittently, in any reiterated manner, or continuously absolute pressure data to create a pressure trend plot against time, determining from said recording either a) a plurality of different pressure levels and duration thereof, or b) a plurality of different pressure changes of different levels and duration thereof, and presenting a) numbers of different pressure levels of various time durations in format of a matrix, or b) presenting numbers of different pressure change levels of various time durations in format of a matrix.

Abstract: This invention describes a method for processing pressure signals derivable from locations inside or outside a human or animal body or body cavity. Different aspects of the invention relate to a method for optimal differentiating between cardiac beat- and artifact-induced pressure waves and a method for obtaining new and improved information from said pressure signals. In particular, this invention describes a system for draining fluid from a brain or spinal fluid cavity according to the inventive method of processing pressure signals.

Abstract: A method for analysing pressure-signals derivable from pressure measurements on or in a body of a human being or animal, includes the steps of sampling said signals and converting the signals to pressure-related digital data with a time reference, wherein the method comprises the further steps of: identifying from said digital data features related to absolute pressures relative to atmospheric pressure, recording repeatedly at specific time intervals, intermittently, in any reiterated manner, or continuously absolute pressure data to create a pressure trend plot against time, determining from said recording either a) a plurality of different pressure levels and duration thereof, or b) a plurality of different pressure changes of different levels and duration thereof, and presenting a) numbers of different pressure levels of various time durations in format of a matrix, or b) presenting numbers of different pressure change levels of various time durations in format of a matrix.

Abstract: This invention relates to a method for analysing pressure-signals derivable from pressure measurements on or in a body of a human being or animal, comprising the steps of identifying during given time sequences in a series of time sequences the single pressure waves, including related parameters [pressure amplitude ?P latency (?T), rise time coefficient (?P/?T)], determining numbers of single pressure waves with pre-selected combinations of two or more of said single pressure wave parameters during said time sequence. For the time sequences is further determined the balanced positions of single wave parameters. Two-dimensional values of balanced position may be presented as a one dimensional value after weighting of the matrix cells. The signal processing method may be used for more optimal detection of single pressure waves by means of non-invasive sensor devices.