Evaluation of PWPT-based method for cuffless monitoring of arterial blood pressure

Abstract

Blood pressure is not a constant, it is continuously changing value which could go beyond of the physiological norm. This phenomenon is called the variability of blood pressure allowing to track changes in the circulatory system functioning. This variability could indicate the presence of various diseases and risk of damage of the vital organs. Nowadays, the only widespread way for accurate assessment of long-term variability is to use standard blood pressure monitor for measuring blood pressure and write down the results manually to the patient diary which is not too convenient while controlling this values is very important both in the treatment of patients with hypertension or desease prognosis. Recently, the interest in indirect methods and systems for blood pressure measuring has grown significantly because of their prospects. This paper reviews the Frank's Windkessel model which describes the interaction of blood pressure and pulse wave velocity. The simultaneous effect of changes in blood pressure and quasiperiods imitating heart rate on changes in pulse wave propagation time is studied. The obtained simulation output have been used for testing of the method of indirect evaluation of blood pressure. Besides, achieved practical experimental results are presented.

Keywords

• Arterial blood pressure
• Windkessel model
• Heart rate
• Pulse wave propagation time
• Pulse wave velocity
• Blood pressure monitoring