Development of a Pulse Oximeter Module to Estimate Continuous Blood Pressure Based on Photoplethysmograph

• Main Authors: Chia-Chun Hong, 洪嘉駿
• Other Authors: Jong-Hann Jean
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/82443781257565730987

碩士 === 聖約翰科技大學 === 自動化及機電整合研究所 === 99 === In this thesis we present the development of a pulse oximeter to estimate continuous blood pressure based on photoplethysmograph and consider its application in home care scenario. In order to accomplish our goal, we combined a sphygmomanometer and a photoplethysmograph module to design a non-invasive blood pressure module which can estimate the continuous blood pressure. First, the Oscillometric Method was used to obtain the diastolic pressure and the systolic pressure of a person. The two parameters are further applied to calibration of the voltage-to-pressure ratio in a photoplethysmograph, which establishes the physiological parameter specific to each person. Second, not only to calculate the SPO2, our pulse oximeter can also measure the value of the continuous blood pressure and the heart rate in a non-invasive way. The pulse oximeter can display real-time results and store the information into a computer, allowing diagnostic reference for doctors. To verify the performance, numerous patients are tested. According to the results of the experiment, the procedure presented in this thesis for estimation of continuous blood pressure was able to effectively achieve the required functions.