患者女,25岁,因妊娠39周临产,于2001年4月28日住院。由于不协调子宫收缩过强致胎儿宫内窘迫,决定在连续硬膜外麻醉下行子宫下段剖宫产术。患者无药物过敏史。术前常规用药,测T 36.9℃,P61次·min-1,R 18次·min-1,BP 112/68mmHg,腰椎二、三间隙穿刺置管,给2％利多卡因共14ml,15min麻醉平面达胸10开始手术,轻切开腹膜时,牵引反应强烈,待胎儿剖出后,经静脉给氯胺酮50mg Female, 25 years old, was hospitalized on April 28, 2001 because of laboring at 39 weeks gestation. Due to uncoordinated uterine contractions caused by fetal distress, decided to continue epidural anesthesia downstream uterine cesarean section. Patients with no history of drug allergy. Preoperative routine medication, measured T 36.9 ℃, P61 times · min-1, R 18 times · min-1, BP 112 / 68mmHg, lumbar puncture two or three puncture, to 2% lidocaine 14ml, 15min anesthesia Plane up chest 10 began surgery, light incision peritoneum, the traction reaction was strong, until fetal dissection, the intravenous ketamine 50mg