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This paper presents a fully wireless cardiac pressure sensing system. Food and Drug Administration (FDA) approved medical stents are explored as radiating structures to support simultaneous transcutaneous wireless telemetry and powering. An application-specific integrated circuit (ASIC), designed and fabricated using the Texas Instruments 130-nm CMOS process, enables wireless telemetry, remote powering, voltage regulation, and processing of pressure measurements from a microelectromechanical systems (MEMS) capacitive sensor. This paper demonstrates fully wireless-pressure-sensing functionality with an external 35-dB.m RF powering source across a distance of 10 cm. Measurements in a regulated pressure chamber demonstrate the ability of the cardiac system to achieve pressure resolutions of 0.5 mmHg over a range of 0-50 mmHg using a channel data-rate of 42.2 kb/s.

Citation

Eric Y Chow, Arthur L Chlebowski, Sudipto Chakraborty, William J Chappell, Pedro P Irazoqui. Fully wireless implantable cardiovascular pressure monitor integrated with a medical stent. IEEE transactions on bio-medical engineering. 2010 Jun;57(6):1487-96

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PMID: 20172781

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