Surgery – Truss – Pad
Patent
1984-10-03
1985-12-31
Cohen, Lee S.
Surgery
Truss
Pad
A61B 500
Patent
active
045614504
ABSTRACT:
This invention is directed to a Wheatstone bridge circuit for measuring pressure in the distal esophageal sphincter (D.E.S.) as well as in other organs and bodily cavities. A flexible hollow tube having three spaced electrodes is lodged in the esophagus. The tube is partly filled with a saline solution to cover the electrodes, thereby producing two series connected, pressure sensitive resistors. The electrolytic resistors are coupled to two series connected fixed resistors to complete the bridge circuit. Electrical imbalances in the bridge circuit are measured in terms of the pressure corresponding to the pressure applied by the D.E.S.
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Borky et al., "Integrated Signal Conditioning for Silicon Pressure Sensor IEEE Trans. on Electron Devices, vol. ED-26, No. 12, 12-1979, pp. 1906-1910.
Cohen Lee S.
Cooch Francis A.
Raubitschek John H.
Spechler Arthur I.
Sykes Angela D.
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