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 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: 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 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, and a method for using said method for controlling an adjustable shunt vale. In particular this invention describes a system for 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 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 system for performing an analysis of pressure-signals derivable from pressure measurements on or in a body of a human being or animal, includes a communication interface for receiving a set of digital pressure sample values, a memory for storing these values, and a processor capable of performing the analysis, the processor having means to identify features related to single pressure waves in the pressure signals based on input of the digital data into the processor, and the processor further having determination means which based on the features is configured to a) determine a minimum pressure value related to diastolic minimum value and a maximum pressure value related to systolic maximum value, b) determine at least one parameter of the single wave parameters elected from the group of: pressure amplitude=?P=[(maximum pressure value)?(minimum pressure value)], latency (?T), rise time or rise time coefficient=?P/?T, and wavelength of the single wave, c) determine number of the single pressure waves occurri

Abstract: 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 from said digital data features related to single pressure waves, and determining at least one parameter of the single wave parameters elected from the group of: pressure amplitude ?P, latency (?T), rise time coefficient ?P/?T, and wavelength of the single wave, as well as determining numbers of single pressure waves with pre-selected combinations of two or more of said single pressure wave parameters during said given time sequence. In another aspect of the invention, the method is capable of identifying from said digital data features related to absolute pressures relative to atmospheric pressure a number of different pressure levels and duration thereof, and presenting the numbers of levels of various time durations in said matrix format.

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 &Dgr;P latency (&Dgr;T), rise time coefficient (&Dgr;P/&Dgr;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.

Abstract: The present invention relates to a system and method for digital sampling, quantitative analysis and presentation of pressures in a body cavity. The invention also relates to a portable apparatus for monitoring, sampling and storing pressure and a software for analysis of pressures. The invention includes an algorithm for analysis and presentations of pressures and a software for performing the analysis. The computer software may be integrated in the portable apparatus and in a variety of systems. The software provides different quantitative presentations of pressure curves as a matrix of numbers of intracranial pressure elevations of different levels and durations and a matrix of numbers of single pulse pressure waves with preselected characteristics. The parameters may be standardised according to recording time and heart rate variability. The data may be presented in different ways, both on-line and off-line after pressure monitoring.

Abstract: The present invention relates to an apparatus for monitoring, sampling and storing pressure in a body cavity or blood pressure of a patient. The apparatus is a small portable recording unit for pressure assessment, including software for analysis of pressure recordings. A pressure transducer implanted e.g. in the skull of a patient senses the pressure and outputs a signal indicative of the pressure in the patients skull. The signals indicative of the pressure are converted to digital signals and sampled and stored by the microcomputer. The apparatus is sufficiently small to allow the patient to move freely around and not be bedridden during pressure recording. Intracranial pressure is sampled and stored by the apparatus several times a second for several days. After the end of pressure sampling, the data is transferred to a computer or network station for analysis. The invention includes a new method for analysis of pressure as well as software for performing the analysis.