Transcutaneous pH measuring instrument

Details Transcutaneous pH measuring instrument Transcutaneous pH measuring instrument

1975-09-08

1977-07-05

Howell, Kyle L.

Surgery

Truss

Perineal

128 2L, 356 39, 356 42, A61B 1000

Patent

active

040333302

ABSTRACT:
A transcutaneous pH measuring device is provided in which a known volume of fluid is brought into equilibrium with body fluids through a membrane on a portion of skin whose surface layers have been stripped away. The fluid contains a pH sensitive dye. Optical measurements of the transmission characteristics of the fluid are obtained when the fluid is in the optical path. During portions of each operating cycle, the fluid is driven back into the vicinity of the skin to pH equilibrate with body fluids while standardization measurements are obtained using an optical plug of known transmission characteristics in the optical path.

REFERENCES:
patent: 3461856 (1969-08-01), Polanyi
patent: 3578865 (1971-05-01), Traver
patent: 3659586 (1972-05-01), Johns et al.
patent: 3793525 (1974-02-01), Burch et al.
patent: 3795239 (1974-03-01), Eberhard et al.
patent: 3811776 (1974-05-01), Blau, Jr.
patent: 3811777 (1974-05-01), Chance
patent: 3825342 (1974-07-01), Lubbers et al.
patent: 3878107 (1975-04-01), Pembrook et al.
patent: 3918434 (1975-11-01), Lubbers et al.

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