Journal of Capital Medical University ›› 2019, Vol. 40 ›› Issue (5): 781-785.doi: 10.3969/j.issn.1006-7795.2019.05.022

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Clinical application value of prenatal diagnosis of placenta implantation by transabdominal three-dimensional ultrasound

Zhang Xuejuan1, Wu Jing1, Zhang Wenping1, Zhou Qi2, Yang Jingchun1   

  1. 1. Department of Diagnostic Ultrasound, Xuanwu Hospital, Capital Medical University, Beijing 100053, China;
    2. Department of Obstetrics and Gynecology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
  • Received:2019-05-20 Published:2019-12-16

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Abstract: Objective To explore the application value of the abdominal three dimensional (3D) ultrasound in the prenatal diagnosis of the placenta implantation. Methods Retrospective analysis of 34 cases with placental implantation risk factors in our hospital were selected, 31 of them received prenatal 3D ultrasound and magnetic resonance imaging (MRI) examination. The imaging findings and diagnostic value were analyzed. Results The results showed that the sensitivity 77.8%,specificity 68.8% and accuracy 74.2% of 3D ultrasound were slightly superior to the sensitivity 50.0%,specificity 60.0% and accuracy 54.8% of MRI,3D ultrasound was consistent with the standard of surgery or pathological diagnosis(Kappa=0.617),moreover,the ultrasonic characteristics of the hypoecho area disappeared behind the placenta(77.8%)and increased blood flow at the base of the placenta(66.7%)were more common in the case of placental implantation.The accuracy of the combined diagnosis of placenta implantation by 3D and MRI was 87.1%,which was significantly higher than that by 3D ultrasound (74.2%) and MRI (54.8%). Conclusion 3D ultrasound has significant advantages in the diagnosis of the placenta implantation.Combined MRI examination can significantly improve the diagnostic accuracy of placental implantation.

Key words: 3D ultrasound, placenta implantation, placenta previa

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