In conclusion, if abnormal capnography is seen where the baseline inspiratory CO2 is higher than usual, inspect the circuit for rebreathing and consider examining the position of ETCO2 sampling port. We recommend confirming ETCO2 sampling port is connected immediately distal to Y-piece before starting a case for accurate CO2 measurement.
Recommended CitationNg, MD, Andrew; Elia, MD, Elia; and Luyun, MD, Lisa, "High Inspired CO2 Capnograph Reading Due to Misplaced End Tidal CO2 Sampling Port" (2010). Department of Anesthesiology Faculty Papers. Paper 7.