Epidural narcotics and dural puncture.
D000368:Aged; D000767:Anesthesia, Epidural / Q000009:adverse effects*; D004388:Dura Mater / Q000293:injuries*; D005260:Female; D006801:Humans; D010149:Postoperative Pain / Q000517:prevention & control; D012131:Respiratory Insufficiency / Q000209:etiology*