title: Whistle discriminator for oxygen and nitrous oxide.
mesh_terms: D000056:Accident Prevention; D000769:Anesthesia, Inhalation / Q000295:instrumentation*; D009609:Nitrous Oxide; D010100:Oxygen; D011482:Protective Devices; D013016:Sound
chemical_list: D009609:Nitrous Oxide; D010100:Oxygen