Integral hermetic implantable pressure transducer

Details Integral hermetic implantable pressure transducer Integral hermetic implantable pressure transducer

A - Human Necessities

61

B

326/16

A61B 5/00 (2006.01) A61B 5/0215 (2006.01) A61B 5/07 (2006.01) G01L 9/00 (2006.01)

Patent

CA 1164955

ABSTRACT OF THE DISCLOSURE 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 assem- bly and aids insertion into the desired area. A lead connects the transducer to an implantable sensing circuit.

385719

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