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Relationship between Arterial and Heated Skin Surface Carbon Dioxide Tension in Adults
Author(s) -
JACOBSEN E.,
GØOSTHGEN I.
Publication year - 1985
Publication title -
acta anaesthesiologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.738
H-Index - 107
eISSN - 1399-6576
pISSN - 0001-5172
DOI - 10.1111/j.1399-6576.1985.tb02185.x
Subject(s) - carbon dioxide , medicine , anesthesia , electrode , linear regression , arterial blood , surgery , chemistry , organic chemistry , machine learning , computer science
Carbon dioxide tension was measured on heated skin surface (PSCO 2 ) and in arterial blood (PaCO 2 ) in eight adult patients during intermittent positive pressure ventilation. A total of 299 PaCO 2 ‐ PSCO 2 measurements were performed at electrode temperatures of 45°C, 43°C and 38°C. The PSCO 2 ‐PaCO 2 relation was evaluated using: 1) linear regression, 2) PSCO 2 /PaCO 2 ratio and 3) temperature correction methods. Both linear regression and ratio indicate temperature dependency of the PSCO 2 ‐PaCO 2 relation. The temperature correction method was done with a blood PCO 2 temperature coefficient of 4.6% per °C and at two temperatures: electrode temperature (according to Severinghaus) and estimated capillary blood temperature. The results indicate that the relation between PaCO 2 , PSCO 2 and electrode temperature is constant enough to permit estimation of PaCO 2 from PSCO 2 during stable circulatory conditions.