Telemetric in-vivo calibration method and apparatus using a negative pressure applicator
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United States of America Patent
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Jun 30, 1987
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N/A
app pub date -
Jul 3, 1985
filing date -
Jul 3, 1985
priority date (Note) -
Expired
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Abstract
A method and apparatus are presented here which extend previous concepts of my patents and papers involving the in-vivo calibration of a telemetric pressure sensor by utilizing variations of positive and negative applied pressures on the skin which overlies the sensor. The sensor has a diaphragm means which, on one side, senses bodily pressure to be measured and, on the other side, senses the pressure under the skin. By pressing or pulling on the skin with positive and negative pressure applied to the outside of the skin, a zero point calibration of the device is achieved, and also a full calibration curve of the device, meaning its diaphragm means movement versus differential pressure across it, can be determined. A design for negative pressure application is also revealed.
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