title: Expiratory valve dysfunction in a semiclosed circle anesthesia circuit--verification by analysis of carbon dioxide waveform.
mesh_terms: D000328:Adult; D000776:Anesthesiology / Q000295:instrumentation*; D001944:Breath Tests / Q000295:instrumentation; D002245:Carbon Dioxide / Q000032:analysis*; D004868:Equipment Failure; D006801:Humans; D007432:Intraoperative Period; D008297:Male; D013058:Mass Spectrometry; D008991:Monitoring, Physiologic / Q000295:instrumentation*
chemical_list: D002245:Carbon Dioxide