Factors associated with elimination of type II endoleak during the first year after endovascular aneurysm repair
Date
2020Language
en
Sujet
Résumé
Objective: The natural history of endoleak type II (ET II) after endovascular aneurysm repair (EVAR) is still debatable. The aim of this study was to examine the presence of preoperative and postoperative factors associated with persistence of ET II during the initial 12-month follow-up period. Methods: A two-center retrospective study including patients subjected to EVAR from 2006 to 2017 was undertaken. Patients with ET II at 1-month computed tomography angiography (CTA) were categorized into two groups, resolution (group 1) vs persistence (group 2) of ET II at 12-month CTA. Preoperative demographics, comorbidities, aneurysm anatomic details, and pelvic artery index were assessed. Intraoperative details were also recorded. Results: Of 825 patients, 140 (17%) patients (mean age, 71.7 ± 8.5 years; 94% male) presented with ET II at 1-month CTA. Group 1 included 58 patients (41%) and group 2, 82 patients (59%). The anatomic characteristics of the inferior mesenteric artery and lumbar arteries and the pelvic artery indices were not associated with ET II persistence. All patients in group 1 had presence of intraluminal thrombus (ILT) on preoperative CTA (group 1, 100%; group 2, 67%; P =.001), and the circular pattern of ILT was more common in group 1 (group 1, 44%; group 2, 24%; P =.01). At 12-month CTA, the mean sac regression was higher in group 1 (group 1, −3 ± 4 mm; group 2, 0.55 ± 3 mm; P =.000). After multivariate analysis, persistence of ET II was directly associated only with intraoperative internal iliac occlusion (odds ratio [OR], 0.232; 95% confidence interval [CI], 0.06-0.86; P =.03) and inversely with statin therapy (OR, 2.6; 95% CI, 1.01- 6.8; P =.047) and sac regression (OR, 1.24; 95% CI, 1.11-1.39; P =.001). Conclusions: Induced occlusion of the internal iliac artery during EVAR was the only factor associated with persistence of ET II during the first year after EVAR. The presence and pattern of ILT may play a role in ET II persistence, whereas the number of patent infrarenal aortic branches and their diameter as well as the pelvic artery indices were not associated with ET II. The use of statins may have a positive effect on ET II resolution during the first postoperative year. Sac diameter is more likely to regress in patients with ET II resolution. © 2019 Society for Vascular Surgery
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