Key result
Wearable PMUTs array tracks blood pressure waveforms with accuracy within 5 mmHg.
Why the study?
Continuous BP monitoring provides critical dynamic insight into cardiovascular status, and ultrasound enables non-invasive, high-penetration measurement.
A novel wearable ultrasonic transducer array demonstrates continuous, non-invasive blood pressure monitoring with clinical-grade accuracy.
May support wearable continuous BP monitoring; leaves open prospective clinical validation before practice change.
Continuous monitoring of blood pressure (BP), one of the most critical vital signs, can provide direct and dynamic insight into cardiovascular status. Ultrasound has emerged as a widely-used approach for BP measurement due to its non-invasiveness and high penetration capability. This paper demonstrates a continuous, real-time, non-invasive, and wearable BP monitoring system based on an aluminum nitride (AlN) piezoelectric micromachined ultrasonic transducers (PMUTs) array. A <tex-math notation="LaTeX">23× 26 </tex-math> PMUTs array, in size of <tex-math notation="LaTeX">3× 3 </tex-math> mm2, is fabricated and packaged as a wearable device. The PMUTs array exhibits excellent acoustic directivity and penetration depth, allowing for the positioning of the radial artery and capture of the diameter waveform. Highly accurate monitoring of BP waveform is demonstrated, with precision and accuracy within 4.5 mmHg and 5 mmHg, respectively, meeting requirements of clinical use. This wearable device can maintain good and long-term contact with the skin, and provide stable monitoring of BP waveforms without any discomfort, even during the motion of hand. [2023-0085]
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Zhou et al. (2023) studied Blood pressure monitoring. Wearable piezoelectric micromachined ultrasonic transducers (PMUTs) array was evaluated on Blood pressure waveform monitoring precision and accuracy. A wearable PMUTs array demonstrated highly accurate monitoring of blood pressure waveforms with precision and accuracy within 4.5 mmHg and 5 mmHg, respectively.
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