Study to Determine if the Valiant Stent Graft is Safe and Effective in Treating Patients Who Have a Blunt Thoracic Aortic Injury

Inclusion Criteria * Subject had a blunt thoracic aortic injury which: * was confirmed, at a minimum, by diagnostic contrast-enhanced computerized tomography angiogram (CTA) and/or contrast-enhanced magnetic resonance angiogram (MRA) * occurred no more than 30 days prior to the stent implant procedure * Subject was ≥ 18 years of age * Subject or subject's legally authorized representative signed an IRB approved informed consent * Subject was hemodynamically stable * Subject's anatomy met all of the following anatomical criteria: * Aortic diameter (adventitia to adventitia) of the proximal and distal landing zones between 18 mm and 44 mm * Subject had patent iliac or femoral arteries or could tolerate an iliac conduit that allowed endovascular access to the injury site with the delivery system of the appropriate sized device * The centerline distance from the distal margin of left common carotid artery (LCC) to the injury was ≥ 20 mm Exclusion Criteria * Planned placement of the COVERED portion of the stent graft over the celiac axis or the LCC, or in cases of bovine anatomy, innominate artery * Subject had systemic infection * Subject was pregnant * Subject had received a previous stent or stent graft or previous surgical repair in the DTA * Subject had a history of bleeding diathesis, coagulopathy, or refuses blood transfusion * Subject was participating in an investigational drug or device clinical trial which would interfere with the endpoints and/or follow-ups of this study * Subject had a known allergy or intolerance to the device components * Subject had a known hypersensitivity or contraindication to anticoagulants or contrast media, which was not amenable to pre-treatment * Subject was in extremis, defined as subject that had non-survivable injury/condition * Subject had a Cerebral Vascular Accident (CVA) within two (2) months prior to implant procedure