MRI诊断凶险性与非凶险性前置胎盘的临床研究
Journal of Clinical Radiology(2016)
Abstract
目的 探讨MRI对凶险性前置胎盘(PPP)与非凶险性前置胎盘(nPPP)及并发胎盘植入的诊断价值.方法 搜集75例行MRI检查并经手术病理诊断为前置胎盘患者,绘制MRI诊断PPP及nPPP(1组)、PPP并胎盘植入(2组)以及nPPP并胎盘植入(3组)的ROC曲线,获得2、3组检查方法的敏感度、特异度及Youden指数.应用确切概率法分析比较PPP与nPPP发生胎盘植入的差异.结果 MRI诊断l组、2组、3组的ROC曲线下面积分别为0.859、0.817、0.509;MRI诊断PPP和nPPP发生胎盘植入的灵敏度、特异度、Youden指数、阳性及阴性预测值分别为77.8%、20.0%,85.7%、81.8%,0.635、0.018,96.6%、50.0%,42.9%、52.9%;比较PPP与nPPP发生胎盘植入差异具有统计学意义P(i)=17.237,P=0.000,<0.05.结论 MRI在诊断PPP与nPPP、PPP并胎盘植入方面具有较好的诊断效能.PPP合并胎盘植入的发生率高于nPPP.
MoreKey words
MRI,Pernicious,Non-pernicious,Placenta previa,Placenta accreta
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