Tehran University of Medical Sciences Frontiers in Emergency Medicine 2717-3593 6 3 2022 01 05 e31 e31 Hasan Sultanoglu Department of Emergency Medicine, Duzce University, Faculty of Medicine, Duzce, Turkey Ayse Basaran Department of Emergency Medicine; Mugla Training and Research Hospital, Mugla, Turkey Azad Hekimoglu Department of Radiology, Diskapi Yildirim Beyazit Training and Research Hospital, Ankara, Turkey Engin Deniz Arslan Department of Emergency Medicine, Antalya Training and Research Hospital, Antalya, Turkey Seda Ozkan Department of Emergency Medicine, Istanbul University-Cerrahpasa, Cerrahpasa Faculty of Medicine, Istanbul, Turkey. 2021 10 12 2021 12 06 Objective: We aimed to evaluate the performance of ultrasonography (US) versus computed tomography (CT) scan in detecting intra-abdominal injury among pediatric patients with blunt abdominal trauma. Methods: Pediatric patients aged<18, who were admitted to the emergency department (ED) due to abdominal trauma and underwent both US and CT scan were evaluated retrospectively. Results: A total of 732 pediatric patients were included in this study. Pathology was detected on US of 418 (57.1%) cases, whereas, intra-abdominal pathology was detected in CT scan of 359 (48.7%) cases. The sensitivity of US in detecting pathology (fluid and/or organ injury) was 95.3%, and its specificity was 79.6%. The sensitivity of US in detecting free fluid was 94.9%, and its specificity was 80.5%. In patients with unstable and stable hemodynamic, the sensitivities of US in detection of pathology (fluid and/or organ injury) were 97.6% and 91.6%, and its specificities were 74.3% and 80.9%, respectively. Conclusions: In our study, the sensitivity of US in terms of detecting pathology in pediatrics with blunt abdominal trauma was high, whereas the specificity of US was low. https://fem.tums.ac.ir/index.php/fem/article/view/877 https://fem.tums.ac.ir/index.php/fem/article/download/877/392