APPARATUS FOR DETERMINING AN INDICATOR REPRESENTATIVE FOR A PHYSIOLOGICAL PARAMETER

Abstract: the invention relates to an apparatus for determining an indicator, which is representative for a physiological parameter of a patient like a fluid responsiveness parameter, based on a pulse signal. the apparatus determines a) a respiratory pulse variation signal (r) corresponding to pulse variations caused by ventilation or respiration induced heart-lung interaction based on the pulse signal and b) a systolic part of the respiratory pulse variation signal, which corresponds to a time period in which an increasing or decreasing applied pressure passed the systolic arterial pressure of the patient and which therefore is prone to comprising an artifact. moreover, the respiratory pulse variation signal is modified such that the determined systolic part of the respiratory pulse variation signal is corrected, wherein the indicator is determined based on the measured pulse signal and the modified respiratory pulse variation signal. this procedure allows for a more accurate determination of the indicator.

Inventor(s): Ulrich PFEIFFER, Benjamin STOLZE, Stephan Guido Maria REGH, Antonia KIEFER

CPC Classification: A61B5/0205 (Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition)

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