Nitrous oxide analgesia.
D004781:Environmental Exposure; D005260:Female; D006801:Humans; D009369:Neoplasms / Q000503:physiopathology; D009609:Nitrous Oxide / Q000009:adverse effects*; D010148:Intractable Pain / Q000188:drug therapy*; D011247:Pregnancy; D013727:Terminal Care
D009609:Nitrous Oxide