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J Vasc Interv Radiol · Jul 2002
Detection of room air contamination of angiographic CO2 with use of a gas analyzer.
- William C Culp.
- Department of Anesthesia, University of Texas Medical Branch, Galveston, Texas, USA. culpwilliamc@uams.edu
- J Vasc Interv Radiol. 2002 Jul 1;13(7):735-7.
AbstractThe purpose of this study was to describe a practical method to detect room air contamination in CO2 used for angiography. Samples of CO2 with known room air contamination levels were used in a "bag system" of CO2 delivery and sampled by a gas analyzer commonly used in anesthesia. Nitrogen levels were reliably detected indicating contamination with as little as 2% air. Oxygen levels were reliably detected, indicating contamination with as little as 5% air. Measured CO2 values were unreliable with higher-than-true values at all levels except 100%. All clinically important amounts of N2 and O2 contamination were readily detected by this practical method.
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