title: An inhalation analgesia circuit to minimize nitrous oxide pollution.
mesh_terms: D000397:Air Pollution / Q000517:prevention & control*; D000769:Anesthesia, Inhalation / Q000295:instrumentation*; D003770:Dental Offices; D006801:Humans; D009609:Nitrous Oxide; D012119:Respiration
chemical_list: D009609:Nitrous Oxide