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Abstract

A blood-pressure monitor apparatus including a pulse-wave sensor including pressure sensing elements, a pressing device which presses the pulse-wave sensor against an artery via skin tissue, a selecting device for selecting, as an optimum element, one of the pressure sensing elements, a determining means for changing the pressing force of the pressing device and determining, based on the pulse wave detected by the optimum element while the pressing force is changed, an optimum pressing force with which the pressing device presses the pulse wave sensor against the artery such that a portion of a wall of the artery is flattened, a maintaining device for maintaining the optimum pressing force of the pressing device, a determining means for determining an estimated blood pressure according to a predetermined relationship between blood pressure and magnitude of pressure pulse wave, based on a magnitude of each of heartbeat-synchronous pulses of the pulse wave detected by the optimum element in a state in which the pulse-wave sensor is pressed against the artery with the maintained optimum pressing force, and a display device which displays, in a two-dimensional coordinate system, a curve representing a change of respective amplitudes of heartbeat-synchronous pulses of the pulse wave detected by the optimum element, with respect to a change of the pressing force of the pressing device.

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First Claim