Patent ID: 11950887
Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGY
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 12:
13. A method, comprising:
emitting, using an electroacoustic transducer in proximity to a blood vessel of a subject, multiple soundwaves having multiple frequencies, the soundwaves causing the blood vessel to vibrate;
capturing, using an ultrasound transducer, multiple ultrasound images of the blood vessel when the blood vessel vibrates in response to the soundwaves, the multiple ultrasound images comprising a first set of images showing a vibrational response of the blood vessel to a first set of soundwaves emitted by the electroacoustic transducer over a first range of frequencies, and a second set of images showing a vibrational response of the blood vessel to a second set of soundwaves emitted by the electroacoustic transducer over a second range of frequencies narrower than the first range of frequencies;
determining, from the multiple ultrasound images, based on a vibrational response of the blood vessel to the soundwaves, a resonant frequency of the blood vessel;
determining, using the ultrasound transducer, a wall thickness and a radius of the blood vessel; and
calculating, based on the resonant frequency, the wall thickness, and the radius, a blood pressure of the subject,
wherein determining the resonant frequency of the blood vessel comprises: adjusting, based on the vibrational response of the blood vessel to the first set of soundwaves emitted by the electroacoustic transducer over the first range of frequencies, a frequency of soundwaves output by the electroacoustic transducer to emit the second set of soundwaves over the second range of frequencies.