BLOOD VESSEL STATE ESTIMATING APPARATUS, BLOOD VESSEL STATE ESTIMATING METHOD, AND BLOOD VESSEL STATE ESTIMATING PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a blood vessel state estimating apparatus, a blood vessel state estimating method and a blood vessel state estimating program by which the state of a blood vessel can accurately and easily be estimated.;SOLUTION: This blood vessel state estimating apparatus includes two optical sensors. Also, the blood vessel state estimating apparatus detects the pulse wave of a human body conforming to the variation amount of light which is detected by synchronizing with the other optical sensor, and converts the pulse wave into an electric signal for each optical sensor. Then, the blood vessel state estimating apparatus executes an n-th differential (n is a natural number) to the electric signal for each optical sensor, and identifies characteristic points included in an n-th differential waveform which is the waveform obtained as the result of the n-th differential. Then, the blood vessel state estimating apparatus calculates a difference for the appearance periods of the characteristic points which have been identified by a characteristic point identifying section for each optical sensor. Then, the blood vessel state estimating apparatus estimates the state of the blood vessel of the human body conforming to the difference which has been calculated for each optical sensor, and outputs an estimation result.;COPYRIGHT: (C)2011,JPO&INPIT