抄録
In general, it is necessary to tighten with a pressure manometer such as a cuff for measuring blood pressure (BP). There are, however, discomfort and botheration by tightening with a cuff and wearing the manometer device. We have felt that the device lacks in portability and comfortability for users, and the existing instrument is inadequate for BP monitoring at any time or full-time. In this study, it is intended to carry out BP monitoring using a photoplethysmography (PPG) in consideration of usability. When he/she estimates the BP by using biological signals of the circulatory system, the pulse wave and electrocardiogram are often used. We have tried to estimate BP using only and just the volume pulse wave in order to achieve a more simple measurement although it is common to use such two kinds of biological signals. That is why we have developed an attachment device on a smartphone for measuring PPG at a finger. In addition, we have built a client-server system to be able to estimate BP at that time from the pulse wave data sent from the smartphone. This system will enable users to be released from the constraints of time and place to BP monitoring.
