title: Mass-spectrometry analysis of modern low flow anesthesia systems.
mesh_terms: D000769:Anesthesia, Inhalation / Q000379:methods*; D000777:Anesthetics / Q000032:analysis; D002245:Carbon Dioxide / Q000032:analysis; D006801:Humans; D013058:Mass Spectrometry / Q000295:instrumentation; D009584:Nitrogen / Q000032:analysis; D010100:Oxygen / Q000032:analysis
chemical_list: D000777:Anesthetics; D002245:Carbon Dioxide; D009584:Nitrogen; D010100:Oxygen