产前超声与核磁共振诊断胎盘植入结果比较

目的:分析比较超声与磁共振成像(MRI)产前诊断胎盘植入的临床价值。方法:回顾分析经超声及MRI产前检查的378例胎盘植入高危病例,与产后手术病理及临床结果对照分析。结果:超声对胎盘植入诊断的灵敏度84.6%,特异度98.1%,阳性预测值90.2%,阴性预测值96.8%;MRI诊断的灵敏度89.2%,特异度92.7%,阳性预测值71.6%,阴性预测值97.6%。两种方法灵敏度差异无统计学意义,特异度差异有统计学意义。结论:两种检査方法均可为胎盘植入诊断提供有意义的影像学依据,超声诊断符合率高,可以降低误诊率、避免过度诊断,MRI可以协助诊断降低漏诊率。

Comparison of ultrasound and MRI for prenatal diagnosing placenta increta

Objective:To analyze the clinical value of ultrasonography and MRI for prenatal diagnosing placenta increta.Methods:378 women with high risk of placenta increta were prenatal diagnosed by both ultrasonography and MRI in the retrospective study.The diagnostic results were compared by clinical and postpartum pathological diagnosis.Results:For ultrasonography,the sensitivity was 84.6 ％,the specificity was 98.1％,the positive predictive value was 90.2％,and the negative predictive value was 96.8％.As for MRI,the sensitivity was 89.2％,the specificity was 92.7％,the positive predictive value was 71.6 ％,and the negative predictive value was 97.6 ％.Though there was no significant difference in sensitivity,there was significant difference in specificity between the two diagnosed methods.Conclusion:The both methods can provide meaningful imaging evidences for prenatal placenta increta diagnosis.Ultrasonography is helpful in reduction of misdiagnosis rate and avoidance of overdiagnosis for its high diagnostic accuracy,and MRI can help to reduce the missed diagnosis rate.