MRI Manifestations and Diagnosis Significance of Pernicious Placenta Previa
Objective To investigate the manifestations and diagnostic significance of magnetic resonance imaging(MRI)on pernicious placenta previa(PPP).Methods The data of 67 patients with placenta previa were retrospectively analyzed.All patients received MRI examination before surgery,and were confirmed by cesarean section and pathology.The diagnostic efficacy of MRI in the diagnosis of PPP and placental implantation was analyzed.The diagnostic results of different types of PPP with placenta implantation were observed.Results There were 60 patients with PPP diagnosed by surgical pathology,and there were 7 patients with non-pernicious placenta previa(nPPP)and 59 patients with PPP complicated with placenta implantation.The gold standard was based on the results of surgical pathological diagnosis,and analysis results showed that the positive predictive value of MRI in the diagnosis of PPP was the highest and was up to 96.43％,and its sensitivity,specificity and accuracy rate were 90.00％,71.43％and 88.06％,and the negative predictive value was the lowest at 45.45％.The positive predictive value of MRI was the highest at 97.87％in diagnosing of PPP with placenta implantation,and the specificity was up to 87.50％,the sensitivity and accuracy rate were 77.97％and 79.10％,and the negative predictive value was the lowest at 35.00％.With surgical pathology results of PPP with placental implantation as the gold standard,the diagnostic accuracy rate of MRI was 79.66％,and the diagnostic accuracy rates of sticky,implanted and penetrating placenta implantation were 50.00％,87.10％and 100.00％respectively.Condusion Preoperative MRI has high diagnostic value in the diagnosis of PPP.It can correctly assess the degree of placental implantation in PPP,fully evaluate the relationship between placental tissue and myometrium,and provide effective information for prenatal examination and the development of suitable treatment plans.
NETL
NSTL
万方数据
维普
