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  • Title: Midterm clinical success and behavior of the aneurysm sac after endovascular AAA repair with the Excluder graft.
    Author: Melissano G, Bertoglio L, Esposito G, Civilini E, Setacci F, Chiesa R.
    Journal: J Vasc Surg; 2005 Dec; 42(6):1052-7. PubMed ID: 16376191.
    Abstract:
    OBJECTIVE: Recent studies have reported different sac behavior after endovascular repair of abdominal aortic aneurysms, depending on the endografts. This study was designed to evaluate mid-term outcome and sac behavior after treatment with the Gore Excluder stent-graft. METHODS: Between June 1999 and January 2005, 109 selected patients with suitable anatomy were treated electively for abdominal aortic aneurysm with the Excluder stent graft. Data were prospectively collected in a computerised database and included demographics, details of the aortoiliac anatomy, procedural and clinical success, and postoperative complications. Postoperative sac size and the presence of endoleaks were assessed with computed tomography scans obtained at 1, 6, and 12 months, and yearly thereafter. All diameter measures in patients followed for > 1 year (84.4%) were analyzed. RESULTS: Assisted primary technical success was achieved in 108 cases (99.1%). No type I endoleaks and 12 (11.1%) type II endoleaks were recorded < or = 1 month from the procedure. Mean follow-up was 29.6 +/- 16.1 months. We recorded one new-onset type IA endoleak, complete resolution of five type II endoleaks, and eight new-onset type II endoleaks. The overall prevalence of type II endoleaks was 14%. Shrinkage at 1, 2, 3, and 4 years was observed in 20.7%, 30.5%, 38.9%, and 36.8% of cases. The presence of type II endoleak influenced the trend of aneurysm size throughout the 4 years. Aneurysms without endoleak shrank more than aneurysms with type II endoleak (P < .0001). We observed two cases of sac enlargement due to the presence of endoleaks. No cases of endotension with sac enlargement, late open conversion, or aneurysm-related deaths were observed. Unchanged aneurysmal sacs remained stable during follow-up, with no adverse events. CONCLUSIONS: Endovascular treatment with the Excluder device in selected patients produces low rates of shrinkage, but this peculiar sac behavior does not affect mid-term clinical success.
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