Introduction: A few reports have documented isoflurane leakage causing damage to the water trap in the Drager Apollo anesthesia machine. This case describes an abnormal capnograph tracing yielding falsely normal end-tidal carbon dioxide tension (EtCO2) after breakage of the water trap by isoflurane.
Manabat, MD, Eileen R.; Berman, MD, Richard; and Kang, MD, Yoogoo, "Inadvertent Respiratory Acidosis due to Damaged Water Trap of Capnograph by Isoflurane" (2010). Department of Anesthesiology Faculty Papers. Paper 6.