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| Prenatal ultrasound diagnosis of placental abnormalities and pregnancy outcomes |
| WEI Wei, WANG Hong, LI Guo-jing, GUO Qiu-yun, DING Gui-chun, WANG Jian-hua |
| Department of Ultrasound, PLA Army General Hospital, Beijing 100700, China |
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Abstract Objective: To investigate the value of ultrasound in diagnosis of placental abnormalities and the outcomes of pregnancy. Methods: Ultrasound images of 126 cases of postnatally confirmed placental abnormalities were analyzed retrospectively. Two hundred and four others were randomly selected from the normal group as control. Rate of preterm birth, birth defects and neonatal weight were analyzed. Relationship between pregnancy outcome and placental abnormalities was also analyzed. Results: Confirmed by delivery or caesarean section, there were a total of 126 cases of placental abnormalities, with 57 cases of placenta previa, 4 cases of placenta implantation alone, 15 cases of placenta previa complicated with placenta implantation, 43 cases of abnormal placental shape, 4 cases of placenta neoplasm and 3 cases of placental abruption. Ultrasound diagnosis was correct in 117 cases, with the diagnosis accuracy of 92.8%. The difference of low birth weight between the two groups was statistically significant. Conclusion: Severe placental abnormalities result in undesirable pregnancy outcomes. Accuracy of prenatal ultrasound diagnosis for placental position and shape is high. The detection rate of placenta previa combined with placenta implantation is higher than simple placenta accreta. The placental abnormality of the back wall of uterus is more easily to be missed.
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Received: 24 October 2016
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