| Clinical Use of Transcutaneous Monitoring of PO2 and PCO2 in the ICU Patients. |
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Shin Ok Koh, Hung Kun Oh |
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Department of Anesthesiology, Yonsei University College of Medicine, Seoul, Korea. |
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| Abstract |
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Transcutaneous oxygen and carbon dioxide tension (PtcO2 and PtcCO2) measured with a heated electrode was compared with arterial owygen and carbon dioxide tension (PaO2 and PaCO2) in 5 groups of 37 patients admitted to the Intensive Care Unit, Severance hospital, from October 1985 to February, 1986. The results were as follows 1) In the group I (6 neonate patients), the PtcO2 and PtcCO2 index was 0.89.
1.02. The relationship of the two method is given br the regreasion equation(in mmHg) : PaO2= 1.15 (PtcO2) +0.77(r: 0.86 P<0.001) PaCO2=0.87 (PtcCO2) +5.12(r: 0.91 P<0.001) 2) In the group 2(13 mpmsirgocal patients) the PtcO2 and PtCO2 index was 0.71, 1.03. The relationship of the two methods is given by the regression equation(in mmH7) : PaO2 = 1.42(7t707) -0.27 (r: 7.53 p<0.001) rac07=1.73 (7tc007) -7.43 (r: 0.74 p<0.001) 3) In the group 3(8 immediate postopen heart patients) PtCO2 index was 0.20, PtcCO2 index was 1.25. There was no correlation between PtcO2 and PaO2.
The relationship of the two method is given by the regression equation(in mmHg) : PaCO2= 0.40(ftcCO2) +2l.
68(r: 0.60 p<0,005) 4) In the Group 4(9 postpen heart patient after extubation) PtCO2 & PtCO2 index was 0.60, 1.05, and the relationship of the two method is given by the regression equation (in mmHg): PaO2 =1.92 (PtcO2)+67.26 (r=0.68 P<0.001) 7aCO2=0.64 (PtcCO2)+14.87 (r=0.66 p<0.001) 5) In the group 5(COPD Patient) the Ptco2 and rtcc09 index was 0.84, 1.04. and th? relationship of the two method is given br the regression equation(in mmHg) PaO2 = 1,10 (PtcO2) +7.35 (r=0.81 p<0.001) PaCO2=0.52 (PtcCO2) +21.59 (r: 0.63 P<0.001) Continuous montiroing can reveal large fluctuations in PaO2 and PaCO2 which would be missed by the use of intermittent arterial samples. The transcutaneous electrode can be employed usefully in the neonate and hemodynamic-allr stable adult patient in Intensive Care Unit. However this method is not recommended to the patients in shock, immediate postoper-ative patient with peripheral vasoconstriction and poor perfusion. |
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