产后出血为分娩期严重并发症,是指胎儿娩出后24h内失血量超过500ml,危重者直接危及产妇生命。目前产后出血居我国产妇死亡原因首位。而子宫收缩乏力是产后出血最常见的原因,占产后出血总数的70%～80%,因此,积极防治子宫收缩乏力性出血是降低孕产妇病死率的关键[1]。为了预防产后出血降低产后出血发生率,我院产科在原有应用催产素的基础 Postpartum hemorrhage is a serious complication of childbirth, refers to the fetus after delivery within 24h blood loss of more than 500ml, critically ill directly endangering the life of women. The current postpartum hemorrhage ranks first in the cause of maternal death in China. Uterine atony is the most common cause of postpartum hemorrhage, accounting for 70% to 80% of the total number of postpartum hemorrhage, therefore, active prevention and treatment of uterine atony bleeding is the key to reducing maternal mortality [1]. In order to prevent postpartum hemorrhage to reduce the incidence of postpartum hemorrhage, obstetrics and gynecology in our hospital based on the original application of oxytocin