Abstract

To compare outcomes of type II endoleak embolization involving embolization of the aneurysm sac alone versus the aneurysm sac and branch vessels via a percutaneous trans-abdominal direct sac puncture approach. This retrospective review comprised of 37 consecutive patients (28 men, 9 women; mean age = 78.3 years) who underwent 46 percutaneous trans-abdominal direct sac puncture embolization procedures for type II endoleaks after EVAR from 2011 to 2018. Patients were divided into 2 groups; embolization of the aneurysm sac alone (Group A) and embolization of the aneurysm sac and branch vessels (Group B). Outcomes between the groups were compared by Mann-Whitney U and Pearson χ2 test. The primary outcome was freedom of aneurysm growth, which was defined as <5% aneurysm sac volume change on follow-up computed tomography (CT) imaging or < 5 mm aneurysm sac diameter on ultrasound with no evidence of endoflow within the sac. Technical success was achieved in 97% (36/37). Mean follow-up time were 17.1 months ± 12.6 in group A and 31.1 months ± 19.1 in group B. Embolization agents included cyanoacrylate glue only (61%), glue and coils (30%), and Onyx with or without coils (9%). Types of grafts deployed included infra-renal bifurcated grafts (78%), fenestrated grafts (13%), aorto uni-iliac grafts (7%), and thoracic graft (2%). There was no statistical difference in the freedom of aneurysm growth (54% vs 65%, Group A vs B, p = 0.44) or residual type II endoleak (46% vs 45%, Group A vs B, p = 0.94) between the two groups. No major procedural-related complications encountered. There is no significant difference in the freedom of aneurysm growth when embolizing the aneurysm sac alone versus embolizing the aneurysm sac and branch vessels for type II endoleaks via a percutaneous trans-abdominal direct sac puncture approach.

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