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• W3145962449 abstract "Abstract Background: Resource allocation for traumatic patients who are positive/negative for COVID-19 challenges the diagnosis. We designed this study to compare the chest CT appearances of COVID-19 patients associated with lung contusion versus patients with lung contusion only, to determine the differentiation capability of CT scan concerning the two conditions. Methods: CT-scans of 9 RT-PCR positive patients of lung contusion due to motor-vehicle-accident (COVID-19 with contusion group) and 16 consecutive patients with lung contusions of comparable severity scores from the pre-COVID-19 era (contusion only group) were revaluated retrospectively and blindly by three radiologists in consensus. The distribution and characteristics of presenting CT-scan findings; including presence, shape and distribution of Ground Glass Opacities and consolidations, presence of subpleural sparing, crazy-paving and Atoll sign. In addition, presence of effusions and cavities were compared between the two groups. Time course of the opacities was compared. Results: Bilateral distribution of opacities was noted in 100% of COVID-19 with contusion and 87.5% of contusion only group. There was no significant difference between Ground Glass Opacities or consolidation shapes (P=0.44 and P=0.66). Both Ground Glass Opacities and consolidations were more diffusely distributed in COVID-19 with contusion, while a predominantly peripheral distribution was more commonly seen in the contusion only group (P=0.03 and P=0.01 respectively). Subpleural sparing was noted in 93.8% of contusion only as compared to 44% of CC group (p=0.04). Appearance resembling Atoll sign was noted in 12.5% of the contusion only groups and none of the COVID-19 with contusion group (P=0.01). Time to resolution was significantly longer in COVID-19 with contusion (15±6 days) comparing to contusion only patients (P=0.02). Conclusion: 'Typical' chest CT findings including bilateral peripheral Ground Glass Opacities and consolidations, also crazy-paving and Atoll signs, as well as less typical findings such as subpleural sparing is seen in both lung contusion and COVID-19 pneumonitis. Time course of the lesions might be a better radiologic discriminator between the two entities." @default.
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• W3145962449 date "2020-06-03" @default.
• W3145962449 modified "2023-09-30" @default.
• W3145962449 title "Chest CT scan in patients with contusion and COVID-19, a comparative study with pure lung contusion" @default.
• W3145962449 doi "https://doi.org/10.21203/rs.3.rs-29806/v1" @default.
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