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目的通过MRI观察胎盘植入病例胎盘下血管改变,探讨胎盘植入的新征象,以提高MRI对胎盘植入的诊断价值。方法 41例经MRI检查,临床和病理诊断的胎盘植入患者,与41例随机选取的前置胎盘病例对照,比较两组胎盘下血管的差异。结果以胎盘下出现单纯增粗血管,不均匀增粗血管,增粗血管进入胎盘为异常。植入组胎盘下血管异常者占87.8%(36/41),对照组占9.8%(4/41),两组有极显著性差异(P<0.01)。增粗血管进入胎盘,穿透型占61.5%(8/13);植入型占38.9%(7/18);粘连型占10.0%(1/10)。三者比较有显著性差异(P<0.05)。结论胎盘下血管异常有可能是胎盘植入的新的征象,增粗血管进入胎盘可能有助于产前胎盘植入分型。
Objective To observe the changes of placental vascular under MRI in order to explore the new signs of placenta accreta in order to improve the diagnostic value of MRI in placenta accreta. Methods Totally 41 cases of placenta accreta diagnosed clinically and pathologically were compared with 41 cases of placenta previa randomly selected by MRI. The difference of placental blood vessels between the two groups was compared. The results appear simply under the placenta thickened blood vessels, uneven thickening of blood vessels, thickening of blood vessels into the placenta is abnormal. There were 87.8% (36/41) cases of abnormal placental vascular implants in the implantation group and 9.8% (4/41) in the control group, with significant difference (P <0.01). Thickened blood vessels into the placenta, penetrating type accounted for 61.5% (8/13); implant type accounted for 38.9% (7/18); adhesions accounted for 10.0% (1/10). The three were significant differences (P <0.05). Conclusion Abnormal placental vascular may be a new sign of placenta accreta. Augmenting the blood vessels into the placenta may contribute to the classification of prenatal placenta accreta.