Abstract: A system for representation and analysis of pressure variables in a patient including a plurality of pressure sensors; a signal processor connected to process signals emitted by the sensors, wherein the process comprises a multiplicity of inputs for receiving analog signals from the sensors, wherein each input is connected to a sampling circuit providing a digital signal used by a calculator for performing processing steps comprising: resampling displayed or recorded signals, analyzing the frequency of sampled signals in relation to a range of target frequencies recorded in a memory, for the display and recording of temporal variations of the signals corresponding to slow waves of the signals, and determination of temporal shifts between the slow waves corresponding to two distinct inputs; and a display that shows variations in the signals.

Abstract: A method of analyzing biological pressure signals in a patient including obtaining arterial blood pressure, cerebral blood flow rate and intracranial pressure signals from the patient, and analyzing frequencies of the signals in relation to a range of target frequencies corresponding to at least one of type-B slow waves, infra-B waves and ultra-B waves; and an apparatus for analyzing biological pressure signals in a patient including an acquisition module, located adjacent to the patient and having input channels that receive signals from an arterial blood pressure (ABP) sensor, a cerebral blood flow rate (CBF) sensor, and an intracranial pressure (ICP) sensor; an analysis module that performs frequency analysis of the signals from a target frequency selected from the group consisting of type B slow waves corresponding to a frequency between 8×10?3 hertz and 50×10?3 hertz, infra-B waves corresponding to a frequency lower than 8×10?3 hertz, and ultra-B waves corresponding to a frequency including between 50×10

Abstract: The invention concerns a system for representing and analysing pressure variables comprising pressure sensors [blood pressure, intracardiac pressure], means for processing signals delivered by said sensors and means for displaying variations of said signals, the processing means including a plurality of inputs for receiving analog signals from different sensors. The invention is characterised in that each input is connected to a sampling circuit supplying a digital signal used by a calculator to carry out processing operations including: re-sampling of the displayed or recorded signals, analysing the frequency of said sampled signal relative to a range of target frequencies recorded in a storage unit, displaying and recording temporal variations of the signals corresponding to slow waves, determining the lag between the slow waves of the signals corresponding to two distinct inputs.

Abstract: A method of analyzing biological pressure signals in a patient including obtaining arterial blood pressure, cerebral blood flow rate and intracranial pressure signals from the patient, and analyzing frequencies of the signals in relation to a range of target frequencies corresponding to at least one of type-B slow waves, infra-B waves and ultra-B waves; and an apparatus for analyzing biological pressure signals in a patient including an acquisition module, located adjacent to the patient and having input channels that receive signals from an arterial blood pressure (ABP) sensor, a cerebral blood flow rate (CBF) sensor, and an intracranial pressure (ICP) sensor; an analysis module that performs frequency analysis of the signals from a target frequency selected from the group consisting of type B slow waves corresponding to a frequency between 8×10−3 hertz and 50×10−3 hertz, infra-B waves corresponding to a frequency lower than 8×10−3 hertz, and ultra-B waves corresponding to