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Left Subclavian Artery Coverage is Not Associated with Neurological Deficits in Trauma Patients Undergoing Thoracic Endovascular Repair

      Background

      Endovascular repair of the thoracic aorta (TEVAR) outcomes have been studied with an interest in complications related to left subclavian artery (LSA) coverage in patients with atherosclerotic pathologies; however, specific data on the management of the LSA in a trauma population are lacking. The objective of this study is to evaluate outcomes following TEVAR for traumatic aortic injury based on LSA coverage.

      Methods

      The Vascular Quality Initiative thoracic endovascular aortic repair module (2010–2017) was analyzed. Patients were included if they had a traumatic aortic injury requiring TEVAR. Patients were placed in 2 groups based on coverage of the LSA. Patients were propensity score matched and the primary outcomes were cerebrovascular symptoms and spinal cord ischemia. Additional clinical and resource utilization outcomes were analyzed.

      Results

      Four hundred and fifty one patients were included in the analysis. There were 268 patients in the LSA not-covered group and 183 patients in the LSA covered group. The mean aortic injury grade was 2.88 ± 0.056 vs. 2.88 ± 0.049 in the covered versus not-covered group (P = 0.957). Glasgow coma scale and injury severity score were not different between the groups. There was no difference between groups for cerebrovascular symptoms or spinal cord ischemia, 1.4% vs. 2.8%, P = 0.684 and 0% vs. 2.1%, P = 0.247, after propensity score matching. Significant differences in access site complications and resource utilization were identified between groups.

      Conclusions

      This is the largest series to evaluate complications based on LSA coverage following TEVAR in trauma patients. Our data demonstrate that coverage of the LSA during TEVAR following blunt trauma is associated with no difference in central nervous system outcomes. As such, LSA revascularization strategies, while possible, are not directly supported by these data and should be individualized based on each patient's specific clinical scenario.
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