System identification of integrative non invasive blood pressure sensor based on ARMAX estimator algorithm

Abstract

Varieties of the oscillometric non-invasive blood pressure (NIBP) measuring devices are based on recording the arterial pressure pulsation in an inflated cuff wrapped around a limb during the cuff deflation. The recorded NIBP data contain the pressure pulses in the cuff, called oscillometric pulses, superimposed on the cuff deflation. Some of NIBP devices have also implanted microphone inside the cuff, which enables measurements of Korotkoff sounds The objectives of this contribution are, first, to extract the transfer characteristics of the oscillotonometric method of NIBP deflation from the pressure pulses, and second, to extract the Parametric coefficient of the NIBP system with regression path with ARMAX algorithm.