Key result
A vision-based contactless system for estimating blood pressure achieved an accuracy of 91% for systolic and 90% for diastolic blood pressure compared to an oscillometer device.
Why the study?
Traditional blood pressure measurement cannot monitor continuously and requires direct patient contact, which can cause discomfort.
Does a vision-based contactless system accurately estimate blood pressure compared to a standard oscillometer?
Does a vision-based contactless system accurately estimate blood pressure compared to a standard oscillometer?
A novel contactless vision-based system using pulse transit time and Eulerian video magnification demonstrated 90-91% accuracy in estimating blood pressure compared to a standard oscillometer.
The measurement of vital signs such as blood pressure plays a key role in human health. Usually, we encounter some problems when we check them in the traditional way; for example, it is impossible to check continuously, and measuring vital signs requires direct contact with the patient, which can be uncomfortable for certain individuals. In this research, we present a vision-based system for estimating blood pressure using pulse transit time (PTT) and the Eulerian video magnification (EVM) technique to amplify tiny color variations caused by blood flow to calculate arterial pulse waves traveling between two arterial sites. Calculating the PTT by processing the video signal for each subject, an oscillometer BP device was used to evaluate the performance between measurements in different conditions, including rest, exercise, and during recovery. Mean systolic BP was 115 mmHg at rest, 137 mmHg during high-intensity exercise, and 114 mmHg during recovery, respectively. The average value of diastolic blood pressure did not change significantly before, during, and after exercise. When we compared the systolic and diastolic blood pressure with ground-truth results, our system showed an accuracy of 91% for systolic blood pressure and 90% for diastolic blood pressure.
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Khomidov et al. (2023) studied this question. Vision-based contactless blood pressure measurement system vs. Oscillometer BP device was evaluated on Accuracy of systolic and diastolic blood pressure measurement. A vision-based contactless system for estimating blood pressure achieved an accuracy of 91% for systolic and 90% for diastolic blood pressure compared to an oscillometer device.
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