Cathode for polarographic measurements in physiological medium

Details Cathode for polarographic measurements in physiological medium Cathode for polarographic measurements in physiological medium

1977-03-02

1979-04-10

Michell, Robert W.

Surgery

Truss

Perineal

204195P, A61B 500, A61B 505

Patent

active

041483057

ABSTRACT:
A cathode for polarographic measurements in physiological medium, such as measuring oxygen partial pressure in a human or animal body, is comprised of an elongated cable having a conductive filament, such as a steel wire or a carbon fiber enveloped within an insulating material, such as a layer of polyurethane and sheated in a body-tolerable insulating material, such as a layer of polytetrafluoroethylene. The proximal end of the conductive filament is coated with a layer of a precious metal, such as gold or platinum, and the front face of the cable is provided with a layer of an oxygen-permeable electrically conductive membrane, such as composed of polymethylacrylate or polystyrene. The distal end of the conductive filament is connected to an electrical source, a signal display means and/or a signal processing means.

REFERENCES:
patent: 3399667 (1968-09-01), Nishimoto et al.
patent: 3719575 (1973-03-01), Niedrach et al.
patent: 3749089 (1971-10-01), Derr
patent: 3912614 (1975-10-01), Spracklen
Shinmaru, S., "Cathether-Mounted Oxygen Electrode for Monitoring Oxygen Tension", In Cardiovascular Research Center Bulletin, Apr.-Jun. 1972, pp. 111-122.
Chandler, M.T., Stationary Platinum Electrode for Measurement of O.sub.2 Exchange by Biological Systems Under Hydrostatic Pressure, In the Review of Scientific Instruments, 42 (i): pp. 143-146, Jan. 1971.

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