title: A simple method with no additional cost for monitoring ETCO2 using a standard nasal cannulae.
authors.forename: B C
authors.initials: BC
authors.lastname: Tsui
mesh_terms: D002245:Carbon Dioxide / Q000032:analysis*; D002404:Catheterization / Q000295:instrumentation; D016292:Procedural Sedation; D006801:Humans; D008991:Monitoring, Physiologic / Q000295:instrumentation* / Q000379:methods; D009666:Nose; D012119:Respiration
chemical_list: D002245:Carbon Dioxide