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妊娠晚期出血的原因可有帆状胎盘血管前置破裂,胎盘边缘血窦破裂或宫颈、阴道、外阴局部疾患等,但最常见而且对母儿威胁最大者还是前置胎盘和胎盘早期剥离,因此,本文主要讨论这二种病。一、诊断(一)注意发病有关因素:前置胎盘的发病率约0.8~1.8%。病人往往有多次流产或刮宫病史,这可能由于内膜炎症或手术创伤致子宫内膜不健全有关。胎盘早剥的发病率为0.5~2%,患者可伴有妊高征、慢性高血压、慢性肾炎或外伤史。(二)症状与体征:前置胎盘的主要特征是无诱因无痛性、突然的阴道流血,往往开始于妊娠最后3个
Causes of bleeding in late pregnancy can have previa ruptured vascular veins, placental marginal sinusoid or cervix, vagina, vulvar and other local conditions, but the most common and the most threatening to the mother or the placenta previa and placental early peel, so This article focuses on these two diseases. First, the diagnosis (a) pay attention to the incidence of factors: the incidence of placenta previa about 0.8 to 1.8%. Patients often have multiple miscarriage or curettage history, which may be due to endometrial inflammation or surgical trauma caused by inadequate endometrial related. The incidence of placental abruption is 0.5 to 2%, patients may be associated with pregnancy-induced hypertension, chronic hypertension, chronic nephritis or trauma history. (B) the symptoms and signs: the main feature of placenta previa painless, sudden vaginal bleeding, often beginning in the last three pregnancies