Journal of vascular and interventional radiology : JVIR
-
J Vasc Interv Radiol · Jul 2002
Detection of room air contamination of angiographic CO2 with use of a gas analyzer.
The 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. ⋯ 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.