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《Journal of Qingdao University(Medical Sciences)》 2018-03
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VALUE OF PRENATAL MAGNETIC RESONANCE IMAGING IN CLASSIFICATION OF PLACENTA ACCRETA IN LATE PREGNANCY

ZHAO Min;WAN Xin;WANG Yan;XU Lin;The Obstetric of Affiliated Hospital of Qingdao University;  
Objective To investigate the value of prenatal magnetic resonance imaging(MRI)in classification of placenta accreta in late pregnancy and its guiding significance in clinical treatment. Methods A retrospective analysis was performed for the clinical data of 92 patients who were diagnosed with placenta accreta by surgery or pathology,and classification was performed according to the MRI features and ultrasound findings in late pregnancy.The chi-square test was used to analyze the difference in the classification of placenta accreta between MRI and ultrasound;the Kappatest was used to analyze the consistency between MRI/ultrasound and surgery/pathology in the classification of placenta accrete;the sensitivities,specificities,and consistency of MRI and ultrasound in the diagnosis of gradeⅠ,Ⅱ,andⅢ placenta accreta were calculated. Results There was a significant difference between MRI and ultrasound in the classification of placenta accreta(χ2=9.64,P0.05),and the consistency between MRI and surgery/pathology in the classification of placenta accrete was superior to that between ultrasound and surgery/pathology(Kappa=0.22).In the diagnosis of gradeⅠ,Ⅱ,andⅢ placenta accreta,MRI had sensitivities of 66.67%,79.07%,and 78.57%and specificities of 57.14%,75.56%,and 84.62%,respectively,while ultrasound had sensitivities of 50.00%,76.74%,and33.33% and specificities of 30.00%,54.10%,and 70.00%,respectively;the consistency between MRI and surgery/pathology in the diagnosis of gradeⅠ,Ⅱ,andⅢ placenta accreta was superior to that between ultrasound and surgery/pathology(0.59/0.56/0.67 vs 0.32/0.18/0.22). Conclusion MRI has a better value than ultrasound in the classification of placenta accreta and good consistency with surgery/pathology in the classification of placenta accreta.Therefore,it has guiding significance in surgical termination of pregnancy for pregnant women with placenta accreta in late pregnancy.
【CateGory Index】: R445.2;R714.2
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