A noninvasive blood pressure monitoring system

Abstract

Blood pressure measurement serves as a pivot for diagnosis of cardiovascular conditions and is done conventionally using sphygmomanometer. However this method has the limitations of producing only fewer readings in a given time and causing patient discomfort. Hence there is a need for blood pressure measurement procedure that can give more readings in a given span of time and with utmost ease. We developed a low cost noninvasive blood pressure measurement system which uses the photoplethysmography technique. Reflective Infrared sensors are used for the developed module. The time difference between the blood flow in vein is used to find blood flow velocity, which is eventually used to compute the Systolic blood pressure.