Department of Obstetrics and Gynecology, Showa University School of Medicine, Tokyo, Japan.
Taiwan J Obstet Gynecol. 2012 Mar;51(1):3-6. doi: 10.1016/j.tjog.2012.01.002.
Placenta previa poses a high risk for massive hemorrhage, from the antenatal period until after Cesarean section. This condition increases the risk of maternal and neonatal mortality and morbidity. In cases of placenta previa, the prenatal prediction of sudden bleeding during pregnancy and blood loss during Cesarean section, and the assessment of risk for adherence of the placenta using an ultrasound examination, can improve the perinatal outcome. Therefore, ultrasonographic findings associated with the prediction of massive bleeding in cases of placenta previa are reviewed in this article.
前置胎盘可导致从产前到剖宫产术后大出血，增加母婴死亡率和发病率。前置胎盘时，产前预测妊娠期间突然出血和剖宫产时失血，并使用超声检查评估胎盘粘连的风险，可改善围生期结局。因此，本文综述了与前置胎盘大出血预测相关的超声表现。
