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Cuffless blood pressure monitoring using PTT and PWV methods

Cuff based methods for measuring Blood Pressure (BP) are obtrusive and uncomfortable and demands continuous, non-invasive measurement methods. The aim of this work is to develop a platform that measures BP using indirect techniques such as Pulse Transit Time (PTT) and Pulse Wave Velocity (PWV) methods. The Systolic BP (SBP) and Diastolic BP (DBP) measurement based on PTT and PWV method was found out from the experiments. It is concluded that BP measurements based on PWV methods have less error compared to PTT methods. The absolute error in SBP and DBP measurement based on PWV is +11 mmHg to −12 mmHg and +10 mmHg to −14 mmHg respectively compared to standard cuff based method. Further to this, the ECG and the PPG data were transferred to a nearby data aggregation device over bluetooth and subsequently to a server to enable remote health monitoring.