方法对135例单胎自然分娩的胎盘剥离声像图进行分类，并采用称重法测量第三产程出血量。
Methods All 135 patients had spontaneous delivery at term. The placenta separation was categorized during the third stage labor with ultrasonographic imaging, and quantity of bleeding measured.
目的在第三产程中应用动态超声图像观察胎盘剥离方式，及时处理产后出血。
Objective To observe the mode of placenta separation by dynamic ultrasonographic imaging during the third stage of labor and help manage postpartum hemorrhage.
结果不同方式胎盘剥离的超声图像显示第三产程的时间和出血量有明显差异。
The placenta separation was categorized during the third stage labor with ultrasonographic imaging, and quantity of bleeding measured.
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