患者女,33岁,孕4产3,以停经24周,要求引产入院。既往三次孕产均顺利,末次孕产2年前。产科检查,宫高23cm,腹围86cm,纵产头位,胎心130次/min,弱,引产前三日口服已烯雌酚5mg3次/日,维生素B_620mg3次/日。第4天经腹壁羊膜腔穿刺注射利凡诺尔100mg,76h无宫缩。第10天第二次羊膜腔注射利凡诺尔100mg,38h后出现规律宫缩,持续6h宫口仍未开,故行宫颈内插入8号导尿管留置8h,但宫口仍未开大,4h后行阴道检查,宫 Female patient, 33 years old, pregnant 4 3, to 24 weeks after menopause, requiring induction of labor admission. Past three pregnancies are smooth, the last two years before pregnancy. Obstetric examination, the palace height 23cm, abdominal circumference 86cm, longitudinal head position, fetal heart rate 130 beats / min, weak, three days before induction of oral diethylstilbestrol 5mg3 times / day, vitamin B_620mg3 times / day. On the 4th day, rivanol 100mg was injected into the abdominal wall by amniocentesis. No contractions were observed in 76h. On the 10th day after the second amniotic injection rivanol 100mg, 38h after the regular contraction, continuous 6h cervix still not open, so the line inserted into the catheter on the 8th left for 8h, but the cervix has not opened large, 4h after vaginal examination, Palace