Blood pressure pulse wave measuring device with function to reduce the influence of body motion by triaxial force sensor

Abstract

In this study, we report on a blood pressure pulse wave measuring device with the function to reduce the influence of body motion. The device consists of two triaxial force sensors for measuring pulse wave and noise of body motion. The noise generated from body motion is reduced by subtracting the measured value of the body motion sensor from that of the pulse wave sensor. We measured the pulse wave and the noise during the body motions in the back and forth and the right and left of the wrist, and calibrated by subtracting the value of noise from the pulse wave. The standard deviation of the amplitude of calibrated wave decreased 72.0 % in the body motion of back and forth, and 4.13 % in the body motion of right and left. Therefore we could reduce the influence of body motion of the wrist.