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[Non-contact Blood Pressure Measurement Method Using Frequency Modulated Continuous Wave Radar].
Jinhui Zhang1, Xinyue Zhang2, Wenyao Mu2
1Logistic Support Center, Chinese PLA General Hospital, Beijing, 100853.
Summary
This study introduces a novel algorithm for non-contact blood pressure monitoring using Frequency Modulated Continuous Wave (FMCW) radar. The method achieves high accuracy for both systolic and diastolic blood pressure, enabling continuous monitoring.
Area of Science:
- Biomedical Engineering
- Signal Processing
- Cardiovascular Monitoring
Background:
- Non-contact continuous blood pressure monitoring is crucial for vital sign assessment.
- Frequency Modulated Continuous Wave (FMCW) radar offers potential for non-contact vital signal extraction.
- Existing methods for continuous blood pressure monitoring face limitations in practicality and comfort.
Purpose of the Study:
- To propose a novel heartbeat-guided algorithm for non-contact blood pressure monitoring using FMCW radar.
- To accurately extract pulse wave signals for blood pressure estimation.
- To validate the algorithm's effectiveness in real-world conditions.
Main Methods:
- Utilizing FMCW radar to detect heart rate and extract pulse wave signals from reflected signals.
- Employing Variational Mode Decomposition (VMD) to filter out interferences from respiration and minor body movements.
- Developing an estimation model based on extracted pulse waveform features to determine blood pressure.
Main Results:
- Experimental validation with 15 participants demonstrated high accuracy.
- Average accuracy for diastolic blood pressure (DBP) reached 94.3%.
- Average accuracy for systolic blood pressure reached 94.4%.
Conclusions:
- The proposed FMCW radar-based algorithm is robust and effective for non-contact blood pressure monitoring.
- The findings support the feasibility of long-term, real-time, non-contact blood pressure monitoring.
- This technology has significant implications for remote patient monitoring and healthcare.
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