The Calibration Method for Blood Pressure Pulse Wave Measurement Based on Arterial Tonometry Method

Area of Science:

• Biomedical Engineering
• Cardiovascular Technology
• Wearable Health Devices

Background:

• Accurate blood pressure monitoring is crucial for cardiovascular health management.
• Wearable devices offer convenient, continuous blood pressure tracking but require precise calibration.
• Arterial tonometry is a non-invasive method for estimating blood pressure via pulse wave analysis.

Purpose of the Study:

• To develop and validate a method for accurately calibrating forces measured by a wearable arterial tonometry device.
• To assess the effectiveness of the calibration in mitigating the influence of arm inclination on measurements.
• To improve the reliability and accuracy of blood pressure measurements obtained from wearable devices.

Main Methods:

• Utilized a wearable arterial tonometry device and a commercial manometer for simultaneous measurements.
• Collected force and blood pressure data at three different measurement heights.
• Developed a calibration method based on the relationship between measured force and blood pressure.

Main Results:

• The proposed calibration method significantly reduced the impact of lower arm inclination.
• Achieved a high average coefficient of determination (R²) of 0.96 between force and blood pressure.
• Demonstrated the method's ability to accurately calibrate forces for reliable blood pressure readings.

Conclusions:

• The developed calibration method enables accurate force calibration for wearable blood pressure devices.
• This technique enhances the precision of blood pressure measurements obtained via arterial tonometry.
• The findings support the use of this method for improving the clinical utility of wearable cardiovascular monitoring tools.