VERFAHREN UND GERÄT ZUR NICHTINVASIVEN FORTLAUFENDEN BLUTDRUCKMESSUNG

摘要

Pairs of exciters and sensors are arranged on a substrate in various formations. One pair of an exciter and a sensor is selected in accordance with the detection signal which is derived from an exciter waveform induced in an artery and transmitted therethrough. The arranged on a substrate in various formations. The frequency of the oscillation signal supplied to the exciter is controlled by oscillation signal generation circuits. Bandpass filtering for extracting the exciter waveform, low-pass filtering for extracting a natural blood pressure waveform, phase difference detection processes are provided by a microprocessor. Outputs are selected by a switching circuit and supplied to the microprocessor through one a/d converter. The frequency of the oscillation signal is controlled to an optimum frequency by detecting the detection signal and estimating the attenuation, dispersion, phase shift with respect to different frequencies and by determining one of the frequencies in accordance with the estimation result. The waveform of the oscillation signal is controlled to an optimum waveform, similarly.