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US 12,661,085 B2Granted
Subcutaneous hemodynamic monitoring devices, systems and methods
AssigneeCoravie Medical, Inc.
InventorsAimee Garza, Tanzania Sewell
Life of this patent
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Abstract
An implantable sensor system using one or more sensor implants comprised of micro-electrical mechanical system (MEMS) sensors for the accurate and continuous measurement of physiological hemodynamic signals such as diastolic and systolic blood pressure. Sensor implants are configured to be subcutaneously injected to a placement site adjacent a blood vessel. In some embodiments, sensors comprise micromachined ultrasonic transducers.
Claims20
A hemodynamic sensor system, comprising:
- a sensor implant comprising a housing configured along a housing axis to be positioned subcutaneously in tissue adjacent a target blood vessel in a patient, the sensor implant further comprising within the housing at least two ultrasound transducers positioned along said housing axis with a known distance between the ultrasound sensor transducers, said ultrasound transducers configured to produce signals indicative of a change in diameter of the target blood vessel at spaced apart locations in response to pulsations of the cardiac cycle;
- and
- at least one processor and at least one memory in operative communication with the at least one processor, the memory containing an instruction set comprising machine-executable instructions that, when executed by the at least one processor determine a pulse wave velocity for the target blood vessel based in part on said signals indicative of changes in diameter at the spaced apart locations, the known distance between the ultrasound transducers and a time difference between said signals indicative of a change in diameter of the target blood vessel.
A hemodynamic sensor system, comprising:
- a sensor implant comprising a housing configured along a housing axis to be positioned subcutaneously in tissue adjacent a target blood vessel in a patient, the sensor implant further comprising within the housing at least two ultrasound transducers positioned along said housing axis with a known distance between the ultrasound sensor transducers, said ultrasound transducers configured to focus ultrasound signals on the target blood vessel at a detection distance of about 2 mm to about 50 mm from said blood vessel and to produce signals indicative of a change in diameter of the target blood vessel at spaced apart locations in response to pulsations of the cardiac cycle;
- a controller disposed in the housing configured to detect timing of and process the signals from the ultrasound transducers and to produce a data stream based on said signals from which pulse wave velocity for the target blood vessel and patient blood pressure can be calculated;
- a transceiver disposed in the housing configured to transmit said data stream to an external receiver;
- and
- a power source disposed in the housing operatively connected to power the sensor implant.
2 more elements
Dependencies are inferred from the claim text.