其类型及产前出血状况不能预测其结局，也不能据此提前做出处理方案。
The number of bleeding episodes and the degree of praevia are not associated with outcomes, so they can't be the proof to determine the treatment plan ahead of time.
结论前置胎盘产前大出血量不能以胎盘类型、胎盘附着位置及产前出血次数来预测。
Conclusion the type of placenta, the parts of placental attachment and time of massive hemorrhage do not affect the amount of antepartum hemorrhage in patients with placenta previa.
结论：做好产前预防、产时监测、产后护理、产后出血的抢救，可为产妇的生命安全提供保障。
Conclusion we realize that the antepartum prevention, monitoring during the parturition, postpartum nursing, rescue of postpartum bleeding can provide a important safeguard for the women's lives.
产前、产后出血率增加；
目的加强对前置胎盘孕妇的产前产后全面临床观察与护理，早期发现和预防妊娠晚期出血。
Objective To strengthen clinical observation and nursing of pregnant women with placenta previa before and after delivery so that hemorrhage of late pregnancy can be discovered early and prevented.
目的探讨血清钙离子浓度对产后出血的预测价值及产前应用钙剂预防产后出血的有效性。
Objective To inquire into the predicting value of se rum calcium ion concentration for postpartum hemorrhage and estimate the validity of 10% of calcium gluconate injection before delivery.
目的探讨血清钙离子浓度对产后出血的预测价值及产前应用钙剂预防产后出血的有效性。
Objective To inquire into the predicting value of se rum calcium ion concentration for postpartum hemorrhage and estimate the validity of 10% of calcium gluconate injection before delivery.
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