Patient controlled analgesia.
D000328:Adult; D000700:Analgesics / Q000008:administration & dosage*; D006801:Humans; D010146:Pain / Q000188:drug therapy*; D010149:Postoperative Pain / Q000188:drug therapy; D010358:Patient Participation; D012646:Self Administration / Q000379:methods
D000700:Analgesics