产后出血是产科临床常见的严重并发症之一 ,是当前我国孕产妇死亡的首位原因。在产后出血的四大原因中 ,子宫收缩乏力性出血占首位 ,发生率为 5 0 % 75 % ,约占产后出血的 2 /3[1] 。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。本文对应用米索前列醇防止产后出 Postpartum hemorrhage is one of the most common complication of obstetrics and gynecology, and is the first cause of maternal death in our country. In the four main causes of postpartum hemorrhage, uterine atony leads to the first place, with a rate of 50% to 75%, accounting for about two thirds of postpartum hemorrhage [1]. Therefore, active prevention and treatment of uterine atony bleeding is the key to reducing maternal mortality. This article on the use of misoprostol to prevent postpartum