A Comprehensive Study on Blood Pressure Measurement Techniques

In today's era Health monitoring is one of the sensitive and an important area to look upon. Wireless Body Area Network plays a significant role for improvement in the delivery and monitoring of health care. WBAN is a unique purpose sensor network that provides continuous health monitoring of a person without any restrictions in the daily activities. One of the significant reason that leads to increased number of deaths every year is Cardiovascular illness. An abnormal high blood pressure or hypertension leads to cardiovascular illness. When the blood circulates in the body it applies a certain force on the blood vessels which is measured as Blood Pressure. It affects the cardiac output as well as blood vessels so it is an essential parameter that needs to be monitored. Commonly the device known as sphygmomanometer is used to measure blood pressure which is composed of a cuff, inflation bulb and a manometer. But with the growth in IOT and wearable devices the demand of measuring Blood Pressure using sensors has increased. WBAN can be deployed on the human which consists of certain biological sensors like ECG, PPG etc through which vital parameters can be monitored. In this paper the work reviews the various direct as well as indirect techniques that are used to measure the Blood Pressure. Indirect techniques are preferred over direct ones because they reduce the discomfort and stress caused by cuff inflations.