Raymond Jimenez, Dominic Yurk, Steven Dell, Austin C Rutledge, Matt K Fu, William P Dempsey, Yaser Abu-Mostafa, Aditya Rajagopal, Alaina Brinley Rajagopal
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Resonance sonomanometry for noninvasive, continuous monitoring of blood pressure.
Cardiovascular disease is the leading cause of death worldwide. Existing methods for continuous, noninvasive blood pressure (BP) monitoring suffer from poor accuracy, uncomfortable form factors, or a need for frequent calibration, limiting their adoption. We introduce a new framework for continuous BP measurement that is noninvasive and calibration-free called resonance sonomanometry. The method uses ultrasound imaging to measure both the arterial dimensions and artery wall resonances that are induced by acoustic stimulation, which offers a direct measure of BP by a fully determined physical model. The approach and model are validated in vitro using arterial mock-ups and then in multiple arteries in human subjects. This approach offers the promise of robust continuous BP measurements, providing significant benefits for early diagnosis and treatment of cardiovascular disease.