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目的探讨经腹超声在孕中期前置胎盘诊断中的应用价值。方法采用经腹部超声和经阴道超声检查对720例孕妇进行前置胎盘的筛查,对比2种检查的筛查结果,以经阴道超声诊断结果为金标准,计算经腹超声的诊断准确度、敏感度、特异度及阴性预测值。结果 720例孕妇经阴道超声诊断为前置胎盘41例,经腹部超声诊断准确度为95.14%,敏感度为92.68%,特异度为95.29%,阴性预测值为99.54%。结论经腹超声检查妊娠中期前置胎盘快捷、准确、安全、无创伤、可重复,是目前诊断前置胎盘的首选方法,其对临床进一步诊治具有重要价值。
Objective To investigate the value of transabdominal sonography in the diagnosis of placenta accreta in the second trimester. Methods The placenta of 720 pregnant women were screened by transvaginal ultrasonography and transvaginal sonography. The results of transvaginal ultrasonography were compared with the results of two kinds of screening. The diagnostic accuracy of transabdominal sonography was calculated. Sensitivity, specificity and negative predictive value. Results 720 cases of pregnant women transvaginal ultrasound diagnosis of placenta previa 41 cases, the accuracy of abdominal ultrasound diagnosis was 95.14%, the sensitivity was 92.68%, the specificity was 95.29%, the negative predictive value was 99.54%. Conclusion Transabdominal sonography is a fast, accurate, safe, noninvasive and repeatable method for the diagnosis of placenta previa in the second trimester. It is the first choice for the diagnosis of placenta previa. It is of great value to clinical further diagnosis and treatment.