Patent ID: 7347823
Filing Date: 2008-03-25
Classification: A61B

Abstract:
1. A hemadynamometer, comprising: a piezoelectric device for being pressed by the blood in the artery of a user to output a plurality of pulse piezoelectric signals accordingly; a processor for comparing the waveform slope of the pulse piezoelectric signals to determine a systolic blood pressure wave and a diastolic blood pressure wave, wherein the processor determines and outputs a systolic blood pressure value and a diastolic blood pressure value corresponding to the systolic and diastolic blood pressure waves, respectively, wherein each of the pulse piezoelectric signals before the systolic blood pressure wave has a first wave and a second wave, and the systolic blood pressure wave has a first wave and a second wave, wherein a rising rate and a descending rate of the second wave of the pulse piezoelectric signal are smaller than a rising rate and a descending rate of the first wave of the pulse piezoelectric signal, respectively, a rising rate and a descending rate of the second wave of the systolic blood pressure wave being greater than a rising rate and a descending rate of the first wave of the systolic blood pressure wave, respectively; and a display unit for displaying the systolic and diastolic blood pressure values.