Clinical And Experimental Transcutaneous PCO2 Monitoring
- 1 April 1981
- journal article
- research article
- Published by Wolters Kluwer Health in Journal of Clinical Engineering
- Vol. 6 (2) , 143-147
- https://doi.org/10.1097/00004669-198104000-00013
Abstract
Transcutaneous carbon dioxide (PtcCO2) has been shown to be a clinically useful monitoring tool for adult and neonatal patients. Both heated and nonheated electrodes have been reported to correlate well with PaCO2 on neonates in the first few days of life. Only the heated PtcCO2 electrode (44°C), which responds much faster, has been found to correlate well with PaCO2 in adult patients, rw = 0.95. In all cases, the PtcCO2 value is larger (20 to 25 torr) than the PaCO2 value but they are linearly related. During severe shock, the 44°C, PtcCO2 electrode value rises with decreasing cardiac output (if the cardiac index is less than 1.5 L/minxM2) and does not correlate with PaCO2. Cooler PtcCO2 electrodes are more sensitive to decreasing flow but respond more slowly to changes in PaCO2.Keywords
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