A new methodology of continuous and noninvasive blood pressure measurement by pulse wave velocity

Blood pressure (BP) is one of the most important physiological parameters reflecting cardiovascular status of people. Continuous and non-invasive BP measurement, which can provide beat-to-beat BP information and call attention to the doctor if the patent is in danger during surgery, plays a very important role in safety control in operation and intensive care. In this paper, a novel and complete methodology of continuous and non-invasive BP measurement by PWV without calibration by other methods such as cuff sphygmomanometer is proposed. Critical parts of this study include modeling BP-PWV relationship and identifying two PWVs relative to systolic blood pressure (SBP) and diastolic blood pressure (DBP) respectively. Some benchmark models for 20-year-old and 60-year-old age groups are developed and applied to BP measurement in clinical trials. The clinically obtained results meet the test standard in ANSI/AAMI SP10, which attests the feasibility of the measuring method. Lastly, the continuous SBP and DBP measurement results by PWV method are shown.