Initial Experience with Covered Endovascular Reconstruction of the Aortic Bifurcation in Conjunction with Chimney Grafts

Purpose: To show feasibility of the covered endovascular repair of the aortic bifurcation (CERAB) technique in conjunction with chimney grafts in aortic side branches for complex aortoiliac occlusive disease. Methods: Two European centers and one facility located in New Zealand participated in a retrospective observational study that enrolled 14 consecutive patients (mean age 61.2±8.9 years; 11 men) treated with CERAB in conjunction with chimney graft(s) between December 2012 and May 2015. Indications for treatment included disabling claudication in 9 and critical limb ischemia in 5. Lesions were classified as TransAtlantic Inter-Society Consensus II B (n=1), C (n=1), or D (n=12). Results: A total of 15 chimney grafts were used to perfuse the inferior mesenteric artery (n=8), the right renal artery (n=4), and the left renal artery (n=3). Technical success was achieved in all cases. Procedural complications included 5 unintended dissections and 1 vessel thrombosis, all of which were successfully treated intraoperatively. Five patients developed access-site hematoma/ecchymosis (3 at the brachial access). Mean follow-up was 12 months (range 6-24) without death or loss to follow-up. One patient suffered occlusion of a CERAB limb and an IMA chimney graft; the former was recanalized, but the IMA graft was not; there were no signs of bowel ischemia. Ankle-brachial indices significantly increased from 0.54 (range 0.47-0.60) preoperatively to 0.97 (range 0.90-1.00) in 11 patients examined at 12 months, and all patients had an improvement in the Rutherford category. All CERAB limbs, including the one recanalized, were patent at the most recent follow-up, as were 14 of 15 chimney grafts. Conclusion: Chimney-CERAB is technically feasible and may offer an alternative to open surgery for complex aortoiliac occlusive disease. Further prospective studies are needed to confirm these findings.