1.病例介绍 患者28岁,妊娠36周,孕2产1,主因腹部隐痛伴后坠半天而入院,患者此次妊娠为双胎,孕期经过尚顺利,于入院前半天自觉下腹隐痛伴后坠,自为临产故住院,查体:体温36.4℃,脉搏90次/分,血压13/8kpa,神清、查体合作,心肺检查无异常,腹部膨隆,下腹部有轻压痛,无腹肌紧张及反跳痛,无宫缩,宫口未开。B超 1. Case description Patient 28 years of age, 36 weeks of pregnancy, pregnancy 2 1, mainly due to abdominal pain with falling half a day and admitted to the hospital, the patients were twins, pregnancy is still smooth, half a day before admission, consciously abdominal pain with the fall , Since the temporary hospitalization, physical examination: body temperature 36.4 ℃, pulse 90 beats / min, blood pressure 13 / 8kpa, Shen Qing, physical examination cooperation, no abnormal cardiopulmonary examination, abdominal bulging, mild abdominal tenderness, no abdominal muscle tension And rebound tenderness, no contractions, cervix is ​​not open. B super