Wearable Blood Pressure Measurement Device using Cuffless Blood Pressure Measurement Methods

Abstract

In this study, we report on a wearable blood pressure measurement device using cuffless measurement methods. Our device comprises a wrist band device for the arterial tonometry method and a ring device for the photoplethysmography method. Blood pressure was calculated from the pulse transit time between the ring device and wristband device. Furthermore, we compared the accuracy of blood pressure measured by the arterial tonometry method and that calculated from the pulse transit time and multiple regression equation. The correlation coefficient of the tonometry method was improved from 0.90 to 0.99 using the combination of both cuffless blood pressure measurement methods.