title: A simple mask for nitrous oxide and oxygen analgesia.
abstract: The construction and use of a disposable mask for post-operative nitrous oxide and oxygen analgesia are described.
mesh_terms: D000698:Analgesia / Q000295:instrumentation*; D006801:Humans; D008397:Masks; D009609:Nitrous Oxide; D010100:Oxygen; D010149:Postoperative Pain / Q000628:therapy
chemical_list: D009609:Nitrous Oxide; D010100:Oxygen