Acoustic biosensor for monitoring physiological conditions in a body implantation site
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United States of America Patent
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Nov 5, 2002
Issued Date -
N/A
app pub date -
Mar 10, 2000
filing date -
Dec 30, 1997
priority date (Note) -
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Abstract
An acoustic biosensor is provided for deployment at an implantation site within a body, such as an abdominal aortic aneurysm. The biosensor includes a sensor element for measuring a physiological condition at the implantation site, and for generating an information signal representative of the physiological condition. The biosensor further includes a piezoelectric transducer element for converting an externally originated acoustic interrogation signal into energy for operating the sensor, and for modulating the interrogation signal, e.g., by employing a switching element to alternate the mechanical impedance of the transducer element, to transmit the information signal outside of the body.
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