产后出血的定义是胎儿娩出后24h内失血超过500ml[1],是分娩期严重的并发症,是导致我国孕产妇死亡的四大原因之首,因此提高产科质量,降低产后出血发生率是每个产科工作人员义不容辞的责任。工作中既要分秒必争,采取措施,又要镇静果断地提出治疗方案。在引起产后出血的原因中,子 Postpartum hemorrhage is defined as the blood loss of more than 500ml within 24 hours after the fetus is delivered [1], which is a serious complication of childbirth and is the first of the four causes of maternal mortality in our country. Therefore, improving obstetric quality and reducing the incidence of postpartum hemorrhage is Obstetric staff bounden duty. It is necessary to fight against each other’s work, take measures, but also calm and decisive proposed treatment. In the cause of postpartum hemorrhage, son