经腹超声联合经会阴超声对孕晚期前置胎盘的诊断价值

Value of TUS combined with TPS for diagnosis of placenta previa in late pregnancy

目的 探讨经腹超声联合经会阴超声对孕晚期前置胎盘的诊断价值。方法 选择我院收治的有无痛性阴道出血怀疑为前置胎盘,孕周28~37 w的患者100例,先进行经腹超声检查,再进行经会阴超声检查,分娩后检查胎盘附着子宫的位置作为前置胎盘的诊断标准,分析比较经腹超声和经会阴超声与分娩后的诊断符合率、假阳性率和假阴性率。结果 经腹超声检查与产后诊断的符合率为78.00%,假阳性率为38.89%,假阴性率为12.50%;经腹联合经会阴超声检查与产后诊断的诊断符合率为97.00%,假阳性率为21.43%,无假阴性者。与单纯经腹超声检查相比,经腹联合经会阴超声检查与产后诊断的诊断符合率明显升高,而假阳性率及假阴性率则明显的降低（P〈0.05）。结论 经腹联合经会阴超声检查能提高对孕晚期前置胎盘的诊断符合率,降低假阳性率和假阴性率,具有极高的诊断价值。

Objective To explore the value of transabdominal uhrasound（TUS） combined with transperineal sonography @txS） for the diagnosis of placenta previa in late pregnancy. Methods A total of 100 patients within 28-37 gestational weeks with suspected placenta previa and painless vaginal bleeding were admitted to our hospital. They firstly accepted TUS and then TPS, with the adhering position of placenta in womb examine upon delivery as the diagnostic criteria for placenta previa. Reeulw The coincidence rate between TUS and postpartum diagnosis was 78.00%, with a false positive rate （FPR） of 38.89% and a false negative rate （FNR） of 12.50%; the coincidence rate between TUS combined with TPS and postpartum diagnosis was 97.00%, with a FPR of 21.43% and no false negative. The coincidence rate between TUS combined with TPS and postpartum diagnosis was much higher than that between TUS and postpartum diagnosis, while FPR and FNR decreased greatly （P 〈 0.05）. Conclusion TUS combined with TPS examination can improve the coincidefice rate of placenta previa in late pregnancy and lower FPR and FNR, showing great diagnostic value.