IMAGING SCIENCE AND PHOTOCHEMISTRY ›› 2022, Vol. 40 ›› Issue (5): 1034-1038.DOI: 10.7517/issn.1674-0475.220514

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The Guiding Value of Prenatal Echocardiography in the Delivery Mode of Fetuses with Restricted Foramen Ovale Flow

CHEN Ying, BAO Liwei   

  1. The Affiliated Hospital of Chifeng University, Chifeng 024005, Inner Mongolia, P. R. China
  • Received:2022-05-27 Published:2022-09-13

Abstract: This paper investigated the value of prenatal echocardiography in guiding the delivery mode of fetuses with restricted flow in the simple foramen ovale. 105 fetuses with restricted flow through the foramen ovale alone were selected and followed up until delivery. They were divided into early-onset group (n=30, gestational week <37 weeks) and late-onset group (n=75, gestational week ≥ 37 weeks) according to the gestational week of delivery. Compared the velocity of flow through the foramen ovale, size of the foramen ovale valve, inversion or disappearance of the A wave of the venous duct, abnormal morphology of the arterial duct, cardiothoracic ratio, and right atrium/left atrium (RA/LA), right ventricle/left ventricle (RV/LV), and degree of tricuspid regurgitation. The results showed that the degree of cardiothoracic ratio, RA/LA, RV/LV, and tricuspid regurgitation were higher in the early-onset group than in the late-onset group (P<0.05). The cardiothoracic ratio, RA/LA, RV/LV, and severe tricuspid regurgitation were all associated with early cesarean delivery (P<0.05). The area under the curve of the working characteristics of subjects with RA/LA, RV/LV, cardiothoracic ratio, and severe tricuspid regurgitation predicting early cesarean delivery was 0.764, 0.757, 0.792, and 0.550, respectively, and the AUC for the combination of these upper parameters to predict early cesarean delivery was 0.929. It is evident that the combination of prenatal echocardiography to detect RA/LA, RV/LV, cardiothoracic ratio, and severe tricuspid regurgitation has important value in guiding the mode of delivery.

Key words: prenatal echocardiography, foramen ovale restricted blood flow, mode of delivery, guiding value