超声在前置胎盘诊断中的应用

Application of ultrasound in diagnosis of placenta previa

前置胎盘是产前出血的第1位原因和围生期子宫切除的主要原因，超声可用于预测前置胎盘的自然转归、产前出血，并能对前置胎盘相关疾病如胎盘植入和血管前置进行筛查。利用超声已经提高了前置胎盘的诊治水平，阴道超声也已被广泛接受，但超声在前置胎盘的诊断中仍存在很多临床问题，如用超声预测妊娠所能维持的时间等，这些问题还有待于进一步探索。该文对超声在前置胎盘诊断中的作用进行了综述。

Placenta previa is the first cause of antepartum hemorrhage and the main cause of perinatal hysterectomy. Ultrasound can be used to predict the natural history of placenta previa and antepartum hemorrhage, and to screen related diseases such as placenta implantation and vasa previa. The application of ultrasound has improved the diagnosis and treatment of placenta previa, and vaginal ultrasound has been widely accepted. However, there are still many clinical problems, such as how to predict the period that pregnancy can keep with ultrasound, and these problems need to be further explored. This article reviewed the role of ultrasound in the diagnosis of placenta previa.