Integral hermetic impantable pressure transducer
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United States of America Patent
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-
Oct 4, 1983
Grant Date -
N/A
app pub date -
Sep 12, 1980
filing date -
Sep 12, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hermetically sealed pressure transducer suitable for implantation in a human body. A pressure sensitive circuit is fabricated using contemporary silicon technology. The pressure sensitive circuit is sealed in an oil-filled chamber formed within a titanium cylinder having a glass substrate bottom and a thin titanium top. According to one embodiment, the pressure sensitive circuit contains a sealed inner chamber at a known pressure, thereby measuring pressure relative to a known value. A second embodiment vents the pressure sensitive circuit to produce a relative pressure measurement. A grill protects the assembly and aids insertion into the desired area. A lead connects the transducer to an implantable sensing circuit.
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