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Proceedings Paper

Implantable ultrasound devices
Author(s): David Vilkomerson; Thomas Chilipka; John Bogan; John Blebea M.D.; Rashad Choudry M.D.; John Wang; Michael Salvatore; Vittorio Rotella M.D.; Krishnan Soundararajan
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Paper Abstract

Using medical implants to wirelessly report physiological data is a technique that is rapidly growing. Ultrasound is well-suited for implants -- it requires little power and this form of radiated energy has no ill effects on the body. We report here on techniques we have developed in our experience gained in implanting over a dozen Doppler ultrasound flow-measuring implants in dogs. The goal of our implantable device is to measure flow in an arterial graft. To accomplish this, we place a Doppler transducer in the wall of a graft and an implant unit under the skin that energizes the 20 MHz Doppler transducer system, either when started by external command or by internal timetable. The implant records the digitized Doppler real and imaginary channels and transmits the data to a nearby portable computer for storage and evaluation. After outlining the overall operation of the system, we will concentrate on three areas of implant design where special techniques are required: ensuring safety, including biocompatibility to prevent the body from reacting to its invasion; powering the device, including minimizing energy used so that a small battery can provide long-life; and transmitting the data obtained.

Paper Details

Date Published: 10 March 2008
PDF: 11 pages
Proc. SPIE 6920, Medical Imaging 2008: Ultrasonic Imaging and Signal Processing, 69200C (10 March 2008); doi: 10.1117/12.772845
Show Author Affiliations
David Vilkomerson, DVX, LLC (United States)
Thomas Chilipka, DVX, LLC (United States)
John Bogan, DVX, LLC (United States)
John Blebea M.D., Temple Univ. (United States)
Rashad Choudry M.D., Temple Univ. (United States)
John Wang, Temple Univ. (United States)
Michael Salvatore, Temple Univ. (United States)
Vittorio Rotella M.D., Temple Univ. (United States)
Krishnan Soundararajan, Temple Univ. (United States)

Published in SPIE Proceedings Vol. 6920:
Medical Imaging 2008: Ultrasonic Imaging and Signal Processing
Stephen A. McAleavey; Jan D'hooge, Editor(s)

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