产后出血是分娩过程中最严重的并发症之一,易导致孕产妇死亡,其发病率约为2%~3%~([1])。近几年虽然大力提倡自然分娩,但因各种原因选择剖宫产的孕产妇仍然较多,尤其是难产、瘢痕子宫和高龄产妇。剖宫产的产后出血率明显高于自然分娩~([2])。临床经验表明,突发性的产后出血易得到重视和及时处理,而持续性 Postpartum hemorrhage is one of the most serious complications during childbirth, which can easily lead to maternal death. The morbidity is about 2% -3% ~ ([1]). Although in recent years vigorously promote natural childbirth, but because of various reasons, cesarean section maternal choice is still more, especially dystocia, scar uterus and the elderly maternal. Postpartum hemorrhage rate of cesarean section was significantly higher than that of spontaneous delivery ~ ([2]). Clinical experience shows that sudden postpartum hemorrhage is easy to get attention and timely treatment, and persistent