Method and device for determining brachial arterial pressure wave on the

Abstract

Method and device for determining a proximal arterial blood pressure waveform in a person, starting from a distally measured arterial pressure waveform, by first applying age-dependent waveform filtering to the distal pressure waveform, in order to obtain the proximal pressure waveform with mutually correct systolic, diastolic and mean pressure levels, and by then shifting the filtered pressure waveform by means of calibration to the correct proximal pressure level, for example by calibration of one level of the filtered systolic, diastolic or mean pressure levels with the corresponding proximal pressure level. This can be a single noninvasively measured systolic or diastolic or mean pressure level. The age for the purpose of the age-dependent waveform filtering is derived from the distally measured pressure waveform, for example by means of a trained neural network. The level shift in the filtered pressure waveform can be obtained by means of a regression equation which has entered in it only the filtered pressure waveform with corresponding systolic and diastolic pressure levels, or the above combined with a noninvasively measured single brachial pressure level.