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Cuffless Systolic Blood Pressure Estimation Using Photoplethysmography Signal

Cardiovascular disease (CVD) is the leading reason behind worldwide mortality. Therefore, the early detection and diagnosis of cardiovascular disease is very essential. Examining Arterial blood pressure is deemed as an effective means to identify symptoms associated with CVD. The conventional method of cuff based blood pressure measurement cannot be continuously used as it cause discomfort to patients. The existing methods of continuous cuff less blood pressure measurement measuring Pulse Transit time(PTT) computing the time interval of the ECG R-peak and peak of Photoplethysmography(PPG)requires both ECG and PPG signal. The proposed method in this paper projects an idea of estimating systolic blood pressure cufflessly using PPG signal after computing the ratio of time gap between two PPG peaks acquired from left and right hand fingertips simultaneously to the time gap between two consecutive PPG peaks acquired from left hand fingertip.The study has shown prediction of systolic blood pressure from the measured ratio. This method has an advantage of estimating systolic blood pressure based on PPG signal acquisition only without acquiring ECG signal.