Transcutaneous pO2 electrode.
Measurements of pO2 on the skin surface (tc-pO2) by means of a conventional Clark electrode have under normal conditions (i.e., without producing hyperaemia) shown low tc-pO2 values and thereby indicated only a small exchange of oxygen through the skin. By using a heated Clark electrode specially designed for application on the surface of the skin it is, however, possible to perform continuous, non-invasive monitoring of tc-pO2 which is highly correlated to the arterial pO2 (pO2 (aB)) and which responds rapidly to changes in the inspired oxygen concentration (pO2 (I)). The tc-pO2 electrode developed by Radiometer and based on the above mentioned principles, viz.: --the use of a Clark oxygen electrode --the application of hyperthermia to produce local hyperaemia is described together with the Radiometer TCM1 TC OXYGEN MONITOR. The in vitro calibration of the electrode is performed at 43 degrees C using water saturated with atmospheric air as high calibrating standard, and a sulphite solution as zero standard. The response time of the electrode lies within the range 12-18 sec for 95% response when using a 25 mu Teflon (FEP) membrane. If the calibration is performed as described, the electrode will respond almost linearly to pO2 values up to 700 mmHg.
D001784:Blood Gas Analysis / Q000295:instrumentation*; D004566:Electrodes; D006801:Humans; D008722:Methods; D008991:Monitoring, Physiologic; D010100:Oxygen / Q000097:blood*; D010313:Partial Pressure; D013696:Temperature
D010100:Oxygen