A noninvasive continuous blood pressure measuring apparatus and a method of noninvasively measuring continuous blood pressure

摘要

One of the excitation and sensor pair is selected in accordance with the detection signal from the excitation waveform induced in the artery. A pair of excitation and sensor are arranged on a substrate in a number of formats. A / D converter is provided for each detection signal. Groups excitation frequency of the supplied oscillation signal is controlled by the number of the oscillation signal generating circuit. And a band-pass filter for extracting an excitation waveform, low pass to extract the natural blood pressure wave filter and the phase difference detection processes are provided by the microprocessor, in which the band-pass filter and low-pass filtering process is a band-pass filter and low pass filter being replaced, their output is selected by the switching circuit is supplied to the microprocessor through one a / d converter. Frequency of the oscillation signal is controlled to an optimum frequency hameuroseo evaluate the detection signal and the attenuated, deviation, and detecting and determining one of the different frequencies in response to the evaluation result of the phase shift according to the different frequencies. The waveform of the oscillation signal is similarly controlled by the optimum waveform.