Telemetric differential pressure sensor with the improvement of a conductive shorted loop tuning element and a resonant circuit
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United States of America Patent
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Jun 10, 1986
Issued Date -
N/A
app pub date -
May 17, 1984
filing date -
Jun 21, 1976
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improvement in design of an implantable telemetric differential pressure sensing device enabling thinner, more compact, and simplified construction for the device; increased pressure sensitivity and range of measurement; and a wider class of applications for such pressure sensing devices in diagnostic medicine and clinical monitoring. The implanted device includes a thin, planar, closed, conductive loop which moves with a flexible diaphragm, the diaphragm moving upon changes in the difference of two bodily pressures on its opposite sides. The position of the conductive loop relative to a resonant circuit fixed in the device determines the resonant frequency of the resonant circuit. The resonant frequency is detected telemetrically outside the body, and its value is used to determine the difference in the two bodily pressures.
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