产后出血是危及产妇健康甚至生命的严重并发症,国内外一向被列为孕产妇死亡的四大原因之一。按出血发生的时间分为早期产后出血及晚期产后出血。早期产后出血即一般统称的产后出血。指胎儿娩出后2小时及24小时内,阴道流血量达到或超过400毫升者。出血多发生在产后2小时以内。按原因可分为产后宫缩乏 Postpartum hemorrhage is a serious complication of endangering maternal health and even life, and has been listed as one of the four major causes of maternal death at home and abroad. According to the time of bleeding is divided into early postpartum hemorrhage and postpartum hemorrhage. Early postpartum hemorrhage is generally referred to postpartum hemorrhage. Refers to the fetus within 2 hours and 24 hours after delivery, vaginal bleeding reached or exceeded 400 ml. Bleeding occurred in more than 2 hours after delivery. According to the causes can be divided into postpartum uterine