Deeksha Bhalla1, Atin Kumar2, Shivanand Gamanagatti1, Sushma Sagar3, Subodh Kumar3, Amit Gupta3. 1. Department of Radiodiagnosis, Jai Prakash Narayan Apex Trauma Centre, All India Institute of Medical Sciences, New Delhi, India. 2. Department of Radiodiagnosis, Jai Prakash Narayan Apex Trauma Centre, All India Institute of Medical Sciences, New Delhi, India. dratinkumar@gmail.com. 3. Department of Surgical Disciplines, Jai Prakash Narayan Apex Trauma Centre, All India Institute of Medical Sciences, New Delhi, India.
Abstract
OBJECTIVE: This study aims to evaluate the utility of computed tomography angiography (CTA) signs of vascular injury in the differentiation of vessel transection from pure thrombosis with intact vessel wall. METHODS: Retrospective analysis was done on 146 consecutive patients who had undergone CTA and surgical exploration from January 2015 to September 2019. Twelve imaging parameters were assessed. Chi-square was used to test the difference between groups. In addition, a scoring system was devised where one point each was added for the presence of 5 signs and absence of 3 signs. ROC analysis was done for the variables which had shown significant difference between groups and for the composite score. RESULTS: On surgical exploration, 87 patients had transection of vessel, while 59 had thrombosis. Significant difference was found among the two groups in non-opacification, pseudoaneurysm, extravasation (p = 0.04 each), thrombosed cord (p < 0.001), collaterals (p = 0.001) and hematoma (p = 0.002), while other signs did not show significant difference. The AUC value for each of these variables was < 0.650, while for the score, AUC was .843(.773-.913). A cut-off value of ≥ 1.5 gave 83.1% sensitivity and 70% specificity for diagnosing transection. CONCLUSION: CTA is a useful tool to classify the nature of vascular injury. It is advisable to use a composite score for maximum diagnostic value.
OBJECTIVE: This study aims to evaluate the utility of computed tomography angiography (CTA) signs of vascular injury in the differentiation of vessel transection from pure thrombosis with intact vessel wall. METHODS: Retrospective analysis was done on 146 consecutive patients who had undergone CTA and surgical exploration from January 2015 to September 2019. Twelve imaging parameters were assessed. Chi-square was used to test the difference between groups. In addition, a scoring system was devised where one point each was added for the presence of 5 signs and absence of 3 signs. ROC analysis was done for the variables which had shown significant difference between groups and for the composite score. RESULTS: On surgical exploration, 87 patients had transection of vessel, while 59 had thrombosis. Significant difference was found among the two groups in non-opacification, pseudoaneurysm, extravasation (p = 0.04 each), thrombosed cord (p < 0.001), collaterals (p = 0.001) and hematoma (p = 0.002), while other signs did not show significant difference. The AUC value for each of these variables was < 0.650, while for the score, AUC was .843(.773-.913). A cut-off value of ≥ 1.5 gave 83.1% sensitivity and 70% specificity for diagnosing transection. CONCLUSION: CTA is a useful tool to classify the nature of vascular injury. It is advisable to use a composite score for maximum diagnostic value.
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