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目的:探讨联合应用经腹部及经阴道超声检查方法对诊断妊娠晚期侧后壁及后壁前置胎盘提高准确率的可行性。方法:联合应用经腹部及经阴道超声检查方法,测量40例前置胎盘位于侧后壁及后壁足月产妇的胎盘下缘距子宫颈内口的距离(L)及胎先露部与骶岬之间的距离(D),以此为指标诊断前置胎盘并与术中结果进行比较。结果:产前经腹部超声诊断与术中证实的前置胎盘诊断符合率为75.0%(30/40),产前联合超声诊断与术中证实的前置胎盘诊断符合率为92.5%(37/40),两种超声检查方法诊断符合率比较差异有统计学意义(P<0.05)。结论:联合应用经腹部及经阴道超声检查方法可以有效提高妊娠晚期侧后壁及后壁前置胎盘的诊断准确率。
Objective: To explore the feasibility of combined application of transabdominal and transvaginal ultrasonography for diagnosis of posterior placental and posterior wall placenta in late pregnancy. Methods: The transabdominal and transvaginal sonography was used to measure the distance (L) between the lower edge of the placenta and the internal front of the cervix in 40 cases of placenta previa The distance between the headlands (D) was used as a predictor of placenta previa and compared with intraoperative results. Results The coincidence rate of prenatal transabdominal sonography and preoperative placenta accreta was 75.0% (30/40). The coincidence rate of prenatal combined ultrasonography and placenta accreta placenta accreta was 92.5% (37 / 40). There was significant difference between the two diagnostic methods in the diagnostic accuracy (P <0.05). Conclusion: Combined application of transabdominal and transvaginal ultrasonography can effectively improve the diagnostic accuracy of posterior placenta and posterior wall placenta in late pregnancy.