Importance

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Abstract

The combined sensor with a thermostatted heating device (7, 23) for the simultaneous and continuous transcutaneous measurement of oxygen (O.sub.2) and of carbon dioxide (CO.sub.2) in the blood contains a measuring device (1) for the partial pressure of CO.sub.2 (pCO.sub.2), in which there is pure optical/spectrometric operation or which operates on the principle of pH measurement in an electrolyte (8), and which is separated from the measuring site on the skin by a membrane (13) which is permeable to both CO.sub.2 and light, and contains another measuring device (24, 25, 26) for the spectrometric measurement of the blood oxygen saturation (sO.sub.2). The advantage over a known pO.sub.2 /pCO.sub.2 combined sensor is that the combined sensor according to the invention can be operated at a low operating temperature of, for example, 42.degree. C. or less, so that continuous measurement for 24 hours, for example, is possible without resiting or recalibrating the sensor, and thus it is simple to use in the domestic milieu.

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First Claim