Blood Pressure Estimation using Pulse Transient Time Derived from Photoplethysmogram and Seismocardiogram in Smartphone

Recently, with the advance of technology, it is possible to extend of functions of smartphone extremely. Accordingly, there have been growing number of people who want to receive healthcare services using smartphone. In particular, the smartphone has a variety of sensors and the photoplethysmogram(PPG) signal and seismocardiogram (SCG) signal which are reflected in cardiac functions can be acquired easily. In this paper, we came up with the algorithm measuring the bio-signals using the sensors of smartphone and estimating the blood pressure without transitional blood pressure gauge. As a result, the averages of root mean square error obtained by proposed method and reference values (systolic pressure and diastolic pressure) were 9.6mmHg and 5.8mmHg, respectively.