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Patient Evaluation

Transcutaneous PO2 and PCO2 Measurement

QuestionAnswer
Transcutaneous PO2 and PCO2 Clark & Severinghaus Electrode - allows continuing non-invasive PO2 and PCO2 measurement by electrodes. - electrodes placed on the skin instead of single measurement with a blood sample.
Transcutaneous PO2 and PCO2 Clark & Severinghaus Electrode/Procedure - heating the skin around the electrode to 43-45C = - improves the capillary blood flow (perfusion) and enhance gas movement through the skin
Transcutaneous PO2 and PCO2 Clark & Severinghaus Electrode/Correlated Values - values correlate well with arterial values as long as perfusion is adequate.
Transcutaneous PO2 and PCO2 Clark & Severinghaus Electrode/Accuracy decrease - with increased skin thickness - anemia - conditions with decrease perfusion *shock burns * vascular disease * cardiac defects
Transcutaneous PO2 and PCO2 Clark & Severinghaus Electrode/Placement - best placement of the electrode is over flat areas with good perfusion - on chest beneath the center of R/L clavicle.
Transcutaneous PO2 and PCO2 Clark & Severinghaus Electrode/Care - the electrode should be changed every 4 hrs. - redness occur or blister = move electrode to new site.
Transcutaneous PO2 and PCO2 Clark & Severinghaus Electrode/Calibration - calibration is done on room air (PaO2 = 150 torr PaO2 = 0) with a zero solution. - unable to calibrate check: * torn membrane * poor connection - air leaks = TcPO2 = read higher than PaO2
Created by: sukar
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