BLOOD PRESSURE INFORMATION MEASUREMENT DEVICE AND METHOD FOR CALCULATING INDEX OF DEGREE OF ATHEROSCLEROSIS BY SAID DEVICE

摘要

The present invention provides a measurement device which receives the input of changes in the internal pressure of an air bag attached at a measurement position, and specifies the blood pressure waveform in one pulse from the pressure waveform (S101). An AI value is calculated by specifying the maximum amplitude of an ejection wave of the blood pressure waveform and the maximum amplitude of an reflection wave in one pulse, and the ratio thereof is also calculated (S103). The correspondence relationship between the AI value and a threshold is pre-stored in the measurement device, and based on this the threshold for detecting the rise point of the reflection wave is calculated (S105). The time when the amplitude, which is the product of the threshold multiplied by the maximum amplitude of the reflection wave from among the blood pressure waveforms, has been reached is set as the rise point of the reflection wave and is specified as a feature point for Tr calculation (S107).