Abstract
ObjectiveAbdominal ultrasonography (AUS) assessment of the neonatal abdomen is emerging as a potential useful addition to traditional abdominal radiographs (AXR) to confirm the diagnosis of necrotizing enterocolitis (NEC). The goal of this study was to assess the abdominal sonographic findings of premature infants with NEC, in order to determine whether AUS is more effective than AXR in the diagnosis of NEC. MethodsThis cross-sectional study was performed on consecutive neonates with clinical suspicion of NEC admitted in our hospital’s NICU (Ali-Asghar Children’s Hospital, Tehran, Iran). We prospectively evaluated the hospitalized subjects using AXR and AUS from May 2018 to May 2020. ResultsA total of 53 neonates were included in the study. These patients were divided into two groups: suspected NEC patients (stage I) including 31 subjects and definite NEC patients (stage II and III) including 22 neonates. We found a substantial agreement between the two modalities regarding the detection of pneumoperitoneum and pneumatosis intestinalis (κ: 0·658 for both). The concordance concerning portal venous gas detection was considered slight (κ: 0·315). Thirty-eight patients did not show any signs of portal venous gas in either of AUS or AXR. On the contrary, four patients demonstrated evidences of portal venous gas in both AUS and AXR. AUS detected ten more portal venous gas than AXR. AXR found no cases with positive portal venous gas that were undetected by AUS. The most predictive indicator for surgical intervention in neonates was the presence of free echogenic ascites and loculated fluid. ConclusionOur findings demonstrated that AUS is superior to AXR in demonstrating portal venous gas and pneumatosis intestinalis. Hence, it seems that AUS is a useful adjunct to AXR in the management of NEC.
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