Conclusions
Our analysis demonstrates that tcPCO2, unlike tcPO2, may still closely reflect arterial values in infants with extreme hypotension. Also in shock, electrode temperatures below 44°C appear sufficient for tcPCO2 monitoring in newborn infants.
We did observe, however, a disproportionate rise in tcPCO2 in a few instances, probably associated with an almost stagnant peripheral blood flow. Further clinical studies are necessary to learn more about the behaviour of tcPCO2 under clinical conditions at the borderline between life and death.
References
Versmold HT, Linderkamp O, Holzmann M, Strohacker I, Riegel KP (1978) Limits of transcutaneous pO2 monitoring in sick neonates: Relations to blood pressure, blood volume, peripheral blood flow, and acid base status. Acta Anaesth Scand (Suppl) 68:88–90
Versmold HT, Kitterman JA, Phibbs RH, Gregory GA, Tooley WH (1981) Aortic blood pressure during the first 12 hours of life in infants with birth weight 610 to 4220 grams. Pediatrics 67 (in press)
Severinghaus JW, Stafford M, Bradley AF (1978) tcPCO2 electrode design, calibration and temperature gradient problems. Acta Anaesth Scand (Suppl) 68:118–120
Eberhard P, Schäfer R (1980): A sensor for nonivasive monitoring of carbon dioxide. Br J Clin Equipment 5:224
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Versmold, H.T., Brünstler, I., Enders, A. et al. Transcutaneous pCO2 monitoring of newborn infants in shock at electrode temperatures of 41°C to 44°C. Intensive Care Med 7, 251–252 (1981). https://doi.org/10.1007/BF01702634
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DOI: https://doi.org/10.1007/BF01702634