Remotely interrogated diagnostic implant device with electrically passive sensor
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United States of America Patent
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Mar 27, 2001
Grant Date -
N/A
app pub date -
Mar 24, 1999
filing date -
Mar 24, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An implant device is provided which is responsive to an external interrogation circuit. The implant device includes a structure implantable within a living animal and operatively configured to carry out or assist in carrying out a function within the living animal. The device further includes an electrically passive sensing circuit integral with the structure for sensing a parameter associated with the function. In particular, the sensing circuit includes an inductive element wherein the sensing circuit has a frequency dependent variable impedance loading effect on the interrogation circuit in response to an interrogation signal provided by the exciter/interrogator element, the impedance loading effect varying in relation to the sensed parameter.
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