结论腔内探头超声诊断前置胎盘，图像清晰、准确，产时临床诊断符合率高，值得推广应用。
Conclusion This method might have clear and accuracy image to diagnose the placenta previa that should in used in clinic.
方法对75例可疑前置胎盘者分别用传统腹部扫查和应用腔内探头扫查定位诊断，并与产时临床诊断比较。
Methods 75 cases who were suspicious be suffered from placenta previa were detected with classical ultrasound and intralumen ultrasound. The results were compared with delivery cases.
结果：下肢DVT左侧明显多于右侧，主要表现为静脉腔内血栓回声，探头加压时静脉不被压瘪或部分压瘪，血栓部位无血流信号等。
Result: Left lower limb DVT was more than right one apparently and the main manifestations were echo of DVT, incompressibility of the vein with probe pressure, absence of flow signal, and so on.
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