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In order to investigate the diagnostic value of prenatal ultrasound parameters and signs of pouch and lower thoracic esophagus in the fetus with esophageal atresia (EA), the prenatal ultrasound data of 35 EA fetuses (observation group) confirmed by autopsy after induced labor or postnatal surgery and imaging examination in our hospital from May 2019 to May 2021 were retrospectively analyzed and compared with 35 normal postnatal fetuses (control group). General information and prenatal ultrasound parameters of the two groups, including head circumference (HC), abdominal circumference (AC), double parietal diameter (BPD), fetal body weight (EFW), and signs (small or unmanifested gastric vesicles, amniotic fluid, neck or upper chest pouch, lower chest esophagus not visible), were analyzed using logistic regression. The logistic multifactor regression model for EA diagnosis was established, and the diagnostic value for EA was analyzed. As a result, the HC, AC, and EFW of the observation group were lower than those of the control group, the gastric bubbles were small or not displayed, the amniotic fluid was more, and the signs of neck or upper chest pouch and lower chest esophagus were not visible in the observation group ( P &lt; 0.05 ). Logistic regression analysis showed that decreased ultrasound parameters HC, AC, EFW, small or no gastric bubble, amniotic fluid, neck or upper chest pouch, and no visible signs of lower chest esophagus were all risk factors for EA ( P &lt; 0.05 ). And in the prenatal ultrasound diagnostic model of EA was established, logistic  P = − 19.851 + HC × 0.384 + AC × 0.682 + EFW × 0.695 + small   or   no   gastric   vesicle × 3.747 + amniotic   fluid × 3.607 + cervical   or   upper   chest   sac × 4.104 + invisible   lower   thoracic   esophagus × 4.623 .When logistic  P &gt; 0.468 , AUC was 0.891,  χ 2 was 7.764, diagnostic sensitivity was 91.24%, and specificity was 79.22%. To draw a conclusion, prenatal ultrasound parameters and signs are of great value in the diagnosis of EA. Independent influencing factors of EA include small or no HC, AC, EFW and gastric vesicles, polyhydramnios, neck or upper chest pouch, and invisible lower thoracic esophagus. Logistic multifactor regression model has a high coincidence rate for the prenatal diagnosis of EA, providing a basis for clinical decision-making.

Diagnostic Value of Prenatal Ultrasound Parameters and Esophageal Signs in Pouch and Lower Thoracic Segment in Fetuses with Esophageal Atresia