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1 Department of Radiology, Cardiovascular Unit, University Hospital S. Orsola,
Via Massarenti, 9, 40138 Bologna, Italy.
2 Department of Cardiac Surgery, University Hospital S. Orsola, 40138 Bologna,
Italy.
OBJECTIVE. The optimal treatment for and timing of surgery to repair traumatic aortic injury are still controversial. Endovascular treatment is a viable option in patients with both acute and chronic aortic trauma. However, appropriate patient selection criteria, treatment timing, and long-term durability of endovascular repair remain to be defined. We sought to identify appropriate selection criteria and optimal timing of treatment as well as to assess the long-term durability of endovascular repair.
SUBJECTS AND METHODS. From July 1997 to December 2001, 19 patients with traumatic aortic injury (11 patients with acute and eight with chronic injuries) were selected for endovascular treatment. In all patients, the lesions were sited at the proximal segment of the descending aorta at a distance of 10 ± 17 mm (mean ± SD) from the left subclavian artery. Nine of the patients with acute injuries were treated after clinical stabilization of other severe associated lesions, whereas two patients, in whom hemodynamic and imaging findings suggested an impending rupture, received emergency treatment. Single-detector helical CT or MR imaging was used for patient selection and stent-graft customization before treatment and for evaluation of patients during the follow-up period.
RESULTS. Endovascular stent positioning was successful in all patients. None of the patients developed complications. Aneurysm exclusion and shrinkage were confirmed at followup examinations. A partial covering of the subclavian artery occurred in six patients without interrupting the blood flow. All patients remain asymptomatic after a mean follow-up period of 20 months (range, 1-56 months).
CONCLUSION. Endovascular repair represents an alternative, minimally invasive treatment, particularly suitable for use in patients with traumatic aortic injuries. The decision of whether to provide immediate emergency treatment or to delay treatment should be based on the lesion characteristics on imaging and clinical findings. The durability of treatment seems to be related to the absence of alteration to the aortic wall at the extremities.
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