Nitrous oxide analgesia for cataract surgery.
D000293:Adolescent; D000368:Aged; D000698:Analgesia / Q000379:methods*; D002387:Cataract Extraction / Q000379:methods*; D002648:Child; D006801:Humans; D009609:Nitrous Oxide / Q000008:administration & dosage*
D009609:Nitrous Oxide