Summary
Despite widespread tcPCO2 monitoring the relationship between tcPCO2 and PaCO2 remains unclear. It has been assumed that after standard temperature correction, a constant metabolic factor can explain the elevation of tcPCO2 over PaCO2. Our data demonstrate a progressive increase in the difference between temperature corrected tcPCO2 and PaCO2 as PaCO2 increases. Thus a constant metabolic factor cannot account for the elevation of temperature corrected tcPCO2 over PaCO2. We speculate that as PaCO2 rises, CO2 production exceeds removal resulting in a progressive gradient between temperature corrected tcPCO2 and PaCO2.
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References
O. Siggard-Andersen, “The Acid-Base Status of Blood,” Munkgaard, Copenhagen(1976).
J. Severinghaus, M. Stafford, and A.F. Bradley, TcPCO2 electrode design, calibration and temperature gradient problems, Acta Anesthesiol Scand (Suppl) 68:118–122 (1978).
T.N. Hansen and W.H. Tooley, Skin surface carbon dioxide tension in sick infants, Pediatrics 64:942–945 (1979).
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© 1987 Plenum Press, New York
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Martin, R.J., Beoglos, A., Miller, M.J., DiFiore, J.M., Carlo, W.A. (1987). Current Correction Factors Inadequately Predict the Relationship between Transcutaneous (tc) and Arterial PCO2 in Sick Neonates. In: Huch, A., Huch, R., Rooth, G. (eds) Continuous Transcutaneous Monitoring. Advances in Experimental Medicine and Biology, vol 7. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-1927-6_8
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DOI: https://doi.org/10.1007/978-1-4613-1927-6_8
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4612-9071-1
Online ISBN: 978-1-4613-1927-6
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