Apparatus and method for temperature compensated transcutaneous

Details Apparatus and method for temperature compensated transcutaneous Apparatus and method for temperature compensated transcutaneous

1979-12-05

1981-11-24

Cohen, Lee S.

Surgery

Truss

Pad

204195B, 204195P, A61B 500

Patent

active

043018076

ABSTRACT:
An improved apparatus for non-invasive measurement of transcutaneous carbon dioxide pressure employs a skin engaging sensor including pH and reference electrodes and a temperature sensor. The temperature sensor produces an output signal voltage having a characteristic which can be the same as or the complement of the voltage-temperature characteristic of the deviation voltage component of the pH-reference electrode voltage attributable to temperature deviation effects on the sensor as well as on the skin. An error signal voltage produced at the output of the temperature sensor is combined with the voltage measured across the pH and reference electrodes to provide a corrected voltage having a magnitude indicative of transcutaneous carbon dioxide pressure at a predetermined reference temperature without need to heat the skin or electrode or otherwise control their temperatures.

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Bergveld, "Electronic Circuit Design Principles . . . ", Mod & Biol. Eng. & Comput., 1979, 17, 655-661.
Brown et al., "Oxygen Transport to Tissue", Pharmacology, Mat. Studies & Neonatology, pp. 1103-1108, 1973.

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