Design and development of Pulse transit time based cuffless Blood Pressure monitoring system

Blood Pressure (BP) is a major and most reliable measurement for continuous patient monitoring for their personal health care and patient´s cardiac system. It is observed that stress is the main reason for many serious diseases and cardiac disease is also one of it. To overcome this problem continuous method is required for BP measurement. For this, various techniques are available, i.e. invasive method and noninvasive method, both of these methods are not continuous, So a non-invasive technique based on Pulse transit time (PTT) has been developed that can measure BP continuously for a long time. In PTT, the difference in time between the R-wave peak of electrocardiogram (ECG) signal and rising edge peak of the photoplethysmogram (PPG) signal will be taken out. This time difference is PTT which is used to calculate pulse wave velocity (pwv) that can be directly applied to the BP-PWV relationship to calculate Systolic and Diastolic BP (SBP/DBP).