Telemetric differential pressure sensing system and method...

Details Telemetric differential pressure sensing system and method... Telemetric differential pressure sensing system and method...

A - Human Necessities

61

B

73/3, 326/12.6

A61B 5/02 (2006.01)

Patent

CA 1079086

ABSTRACT OF THE DISCLOSURE A differential pressure sensing device is fully implanted in the body of a patient to monitor internal pressure such as intracranial pressure. A movable element in the sensor communicates with the internal pressure of the body to be measured on one side and the atmospheric pressure on the other, the latter communicated through the intact skin and a nearly coplanar membrane. The movable element's differential pressure dependent displacement changes a physical characteristic of the sensor, such as the resonant frequency of a tuned L-C circuit, and the change is detected external to the body by a radiating detector system, such as a frequency swept radio frequency oscillator, by which the internal pressure is read out.

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