%0 Journal Article
%T Chimney Endovascular Aneurysm Repair Using Endurant Stent
%A Kimikazu Hamano
%A Koshiro Ueda
%A Kotaro Suehiro
%A Makoto Samura
%A Noriyasu Morikage
%A Takahiro Mizoguchi
%A Takashi Nagase
%A Yuriko Takeuchi
%J Journal of Endovascular Therapy
%@ 1545-1550
%D 2019
%R 10.1177/1526602819837311
%X Purpose: To evaluate the advantages of chimney endovascular aneurysm repair (chEVAR) using an Endurant stent-graft with uncovered balloon-expandable stents (BES) for patients with juxtarenal aortic aneurysms. Materials and Methods: Twenty-two patients (mean age 78.5¡À9.0 years; 13 men) who underwent chEVAR using Endurant and uncovered BES between January 2014 and December 2017 were analyzed retrospectively. The maximum aneurysm diameter was 59.1¡À11.9 mm, and the proximal neck length was 5.2¡À2.9 mm. Of the 22 cases, 9 (40%) involved proximal neck angulation and 9 (40%) had a conical neck. Single and double chimneys were performed using BES in 19 and 3 cases, respectively. In 2 cases, an additional self-expanding covered stent was used inside the uncovered BES. Results: The technical success was 91% (20/22) as 2 (9%) cases showed minor type Ia endoleak. No postoperative systemic complications or acute renal dysfunction (Acute Kidney Injury Network classification stage 2 or higher) were observed. The mean radiologic observation period was 16.1¡À9.6 months, and no aneurysm expansion (>5 mm) was observed during this time. The mean maximum aneurysm diameter decreased to 52.9¡À10.2 mm (p<0.001 vs preoperative), with an individual mean sac regression of 6.2¡À5.9 mm. Overall primary chimney stent patency was 100%. One of the 2 cases of intraoperative type Ia endoleak resolved at the 6-month imaging, and no new type Ia endoleaks developed in any cases at follow-up. No additional treatment- or aneurysm-related events were observed. Conclusion: Short-term outcomes of chEVAR using Endurant with uncovered BES have been favorable when covered stents were unavailable, and it can be useful for high-risk patients with juxtarenal aortic aneurysms
%K abdominal aortic aneurysm
%K balloon-expandable stents
%K chimney technique
%K conical neck
%K endoleak
%K juxtarenal aortic aneurysm
%K proximal neck
%K neck angulation
%K self-expanding stent-graft
%U https://journals.sagepub.com/doi/full/10.1177/1526602819837311