# US 2026/0076641 A1 · Device and method for continuous, non-invasive blood pressure monitoring > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0076641 A1 - Document ID: US20260076641A1 - Status: Published application - Kind: A1 - Application number: 19/331,225 - Filed: 2025-09-17 - Published: 2026-03-19 - Earliest claimed: 2024-09-17 - Assignees: Agoatech, LLC - Applicants: Agoatech, LLC - Inventors: Eric Afonso; Luis Afonso - Web page: https://patentgrep.com/patent/US20260076641A1 ## CPC - A61B 8/04: Measuring blood pressure - A61B 8/06: Measuring blood flow - A61B 8/4236: {characterised by adhesive patches} - A61B 8/488: {involving Doppler signals} - A61B 8/5207: {involving processing of raw data to produce diagnostic data, e.g. for generating an image} - A61B 8/565: {involving data transmission via a network} - A61B 8/58: {Testing, adjusting or calibrating the diagnostic device} - A61B 8/4227: {characterised by straps, belts, cuffs or braces} - B06B 1/0292: {Electrostatic transducers, e.g. electret-type} - B06B 1/06: operating with piezoelectric effect or with electrostriction (piezoelectric or electrostrictive devices per se H10N30/00) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - B06B: METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, {e.g.} FOR PERFORMING MECHANICAL WORK IN GENERAL (for particular applications, see the relevant subclasses, e.g. B07B1/40, B23Q17/12, B24B31/06; measurement of mechanical vibrations G01H; in direction finding, locating, distance or velocity measuring G01S; {generating seismic energy G01V1/02}; control of mechanical vibrations in general G05D; sound-producing devices, e.g. bells, sirens, whistles G10K, {e.g. methods or devices for transmitting, conducting, or directing sound in general G10K11/00}; generation of electrical oscillations H03B; electromechanical resonators in general H03H; electromechanical transducers {for communication techniques, e.g. microphones, speakers} H04R) ## Abstract A continuous, non-invasive, blood pressure monitoring system for determining a blood pressure measurement for a wearer is provided. The system has accuracy close to that of an invasive catheter transducer system for continuous blood pressure measurement. The system includes an ultrasonic sensor patch, a processor, and a memory. The patch includes an ultrasonic transducer located externally on a body part of the wearer and in a vicinity of a vessel that is configured to determine a diameter of the vessel. The patch also includes a power component. Further, the memory includes instructions that, when executed by the processor, cause the system to calculate a cuffless blood pressure measurement for the wearer based on the diameter of the vessel as determined by the transducer and transmit the cuffless blood pressure measurement to a host computer via a network. A method for continuous, non-invasive, blood pressure measurement is also provided. ## Claims ### Claim 1 A continuous, non-invasive, blood pressure monitoring system for determining a blood pressure measurement for a wearer, the system comprising: an ultrasonic sensor patch, the ultrasonic sensor patch comprising: at least one ultrasonic transducer located externally on a body part of the wearer and in a vicinity of a vessel, the at least one ultrasonic transducer configured to determine a diameter of the vessel; a power component; at least one processor; and a first memory including instructions that, when executed by the at least one processor, cause the continuous, non-invasive blood pressure monitoring system to: calculate a cuffless blood pressure measurement for the wearer based on the diameter of the vessel as determined by the at least one ultrasonic transducer; and transmit the cuffless blood pressure measurement to a host computer via a network. ### Claim 2 (depends on 1) The system of claim 1, further comprising a calibration system, the calibration system comprising: an inflatable cuff; at least one controller; a compressor in communication with the inflatable cuff and configured to inflate or deflate the cuff; a pressure transducer configured to measure pressure levels to which the inflatable cuff is inflated or deflated in real time; an ultrasonic Doppler sensor located externally on the body part of the wearer in the vicinity of the vessel and positioned proximal to the inflatable cuff, the ultrasonic Doppler sensor configured to determine a velocity of blood flow within the vessel in response to the inflation or deflation of the inflatable cuff; and a second memory including instructions that, when executed by the at least one controller, cause the calibration system to: determine the velocity of blood flow within the vessel located near the ultrasonic Doppler sensor; adjust the velocity of blood flow within the vessel to a predetermined set point by inflating or deflating the inflatable cuff via the compressor; determine the pressure level to which the inflatable cuff is inflated or deflated to maintain the predetermined set point as measured via the pressure transducer, wherein the pressure level corresponds with a transmural blood pressure measurement for the wearer; and transmit the transmural blood pressure measurement to the host computer via the network, wherein the transmural blood pressure measurement is utilized to calibrate the continuous, non-invasive, blood pressure monitoring system to determine the cuffless blood pressure. ### Claim 3 (depends on 2) The system of claim 2, wherein the pressure level ranges from about 0 mmHg to about 300 mmHg. ### Claim 4 (depends on 1) The system of claim 1, wherein the at least one ultrasonic transducer is configured to measure variations in the diameter of the vessel in real time based on data associated with an emitted ultrasonic beam signal and a reflected ultrasonic beam signal. ### Claim 5 (depends on 4) The system of claim 4, wherein the at least one ultrasonic transducer includes an emitter that emits the emitted ultrasonic beam signal and a detector that detects the reflected ultrasonic beam signal. ### Claim 6 (depends on 1) The system of claim 1, wherein the at least one ultrasonic transducer comprises a piezoelectric micromachined ultrasound transducer (PMUT), a capacitive micromachined ultrasonic transducer (CMUT), a lead zirconate titanate (PZT) transducer, or a combination thereof. ### Claim 7 (depends on 6) The system of claim 6, wherein the piezoelectric micromachined ultrasound transducer is a dual-electrode bimorph piezoelectric micromachined ultrasound transducer. ### Claim 8 (depends on 6) The system of claim 6, wherein the piezoelectric micromachined ultrasound transducer is operable at a resonant frequency ranging from about 2 MHz to about 10 MHz. ### Claim 9 (depends on 1) The system of claim 1, wherein the at least one ultrasonic transducer is in the form of an array of ultrasonic transducers. ### Claim 10 (depends on 9) The system of claim 9, wherein a protective material is positioned over the array of ultrasonic transducers, wherein the protective material comprises parylene, silicone, polydimethylsiloxane, or a combination thereof. ### Claim 11 (depends on 9) The system of claim 9, wherein the array of ultrasonic transducers includes a beam forming system for controlling beam steering angles. ### Claim 12 (depends on 9) The system of claim 9, wherein the array of ultrasonic transducers comprises at least four ultrasonic transducers. ### Claim 13 (depends on 1) The system of claim 1, the power component comprising a battery. ### Claim 14 (depends on 1) The system of claim 1, the ultrasonic sensor patch further comprising an attachment means configured for ensuring contact to the wearer. ### Claim 15 A method for monitoring of blood pressure via a continuous, non-invasive, blood pressure monitoring system, the method comprising: i) providing an ultrasonic sensor patch, the ultrasonic sensor patch comprising: at least one ultrasonic transducer located externally on a body part of the wearer and in a vicinity of a vessel; a power component; at least one processor; and a first memory including instructions capable of execution by the at least one processor; ii) emitting an ultrasonic beam signal from an emitter associated with the at least one ultrasonic transducer; iii) receiving a reflected ultrasonic beam signal by a detector associated with the at least one ultrasonic transducer; iv) determining, via the at least one processor, the diameter of the vessel using the emitted ultrasonic beam signal and the reflected ultrasonic beam signal; and v) determining, via the at least one processor, a cuffless blood pressure measurement for the wearer based on the diameter of the vessel. ### Claim 16 (depends on 15) The method of claim 15, further comprising: transmitting the cuffless blood pressure measurement to a host computer via a network. ### Claim 17 (depends on 16) The method of claim 16, further comprising calibrating the continuous, non-invasive, blood pressure monitoring system by: i) providing a calibration system, the calibration system comprising: an inflatable cuff; at least one controller; a compressor in communication with the inflatable cuff; a pressure transducer; an ultrasonic Doppler sensor located externally on the body part of the wearer in the vicinity of the vessel and positioned proximal to the inflatable cuff; and a second memory including instructions capable of execution by the at least one controller; ii) inflating or deflating the cuff with the compressor; iii) measuring the pressure levels to which the inflatable cuff is inflated or deflated in real time via the pressure transducer; iv) determining a velocity of blood flow within the vessel located near the ultrasonic Doppler sensor; v) adjusting the velocity of blood flow within the vessel to a predetermined set point by inflating or deflating the inflatable cuff via the compressor; and vi) determining the pressure level to which the inflatable cuff is inflated or deflated to maintain the predetermined set point as measured via the pressure transducer, wherein the pressure level corresponds with a transmural blood pressure measurement for the wearer. ### Claim 18 (depends on 17) The method of claim 17, further comprising transmitting the transmural blood pressure measurement to the host computer via the network, wherein the transmural blood pressure is utilized to calibrate the continuous, non-invasive, blood pressure monitoring system to determine the cuffless blood pressure. ### Claim 19 (depends on 18) The method of claim 18, wherein the calibration system is disconnected from the continuous, non-invasive, blood pressure monitoring system once calibration has been completed. ### Claim 20 (depends on 17) The method of claim 17, wherein the ultrasonic transducer is a piezoelectric micromachined ultrasound transducer (PMUT), a capacitive micromachined ultrasonic transducer (CMUT), a lead zirconate titanate (PZT) transducer, or a combination thereof, wherein the ultrasonic transducer, the ultrasonic Doppler sensor, or both are operable at a resonant frequency ranging from about 2 MHz to about 10 MHz.