title: Hypercapnia during oxygen therapy.
mesh_terms: D002245:Carbon Dioxide / Q000097:blood; D002908:Chronic Disease; D006801:Humans; D006935:Hypercapnia / Q000209:etiology*; D000860:Hypoxia / Q000097:blood / Q000628:therapy; D010102:Oxygen Inhalation Therapy; D012890:Sleep / Q000502:physiology
chemical_list: D002245:Carbon Dioxide