Single diaphragm telemetric differential pressure sensing system

Details Single diaphragm telemetric differential pressure sensing system Single diaphragm telemetric differential pressure sensing system

1978-04-13

1981-08-04

Howell, Kyle L.

Surgery

Truss

Pad

73722, 128660, A61B 500

Patent

active

042816670

ABSTRACT:
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 tune 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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Collins, C. C., I.E.E.E. Trans. On Bio.-Med. Engng., vol. 14, No. 2, Apr. 1967, pp. 74-83.
Atkinson, J. R. et al., Journ. of Neurosurgery, 1967, vol. 27, No. 5, pp. 428-432.

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