Midterm Results of a Surgeon-Modified Device to Preserve the Flow of the Internal Iliac Artery During Endovascular Repair of Aneurysm: Single-Center Experiences

Background: During endovascular aneurysm repair (EVAR), commercial iliac branch devices (IBDs) have become an inescapable alternative for preserving antegrade internal iliac artery (IIA) blood flow. Due to the different morphological features of aneurysms, commercial IBDs may not be suitable for all patients. Reported experience with the implantation of the new surgeon-modified IBD (sm IBD) is limited. This investigation describes the indications, efficacy, and safety of the sm IBD. Methods: Data from consecutive elective implantations of IBDs in patients between March 2011 and May 2021 in a single center were incorporated. The sm IBDs were indicated in patients with common iliac artery aneurysms (CIAAs) and with a challenging anatomy and in those patients with or without abdominal aortic aneurysm (AAA).Results: Fifteen patients (15 male, mean age 67.6 +/- 7.9 years) were included. Fifteen sm IBDs were implanted in 1 procedure (100%). Fourteen (93.3%) patients had simultaneous endovascular aneurysm repair (EVAR) and 1 (6.7%) patient previously had a bilateral CIAAs repair by EVAR. The mean common iliac artery (CIA) diameter was 36.6 +/- 12.5 mm. Technical success was obtained in all patients (100%). The median operation time was 189.7 +/- 78.6 min, with a median fluoroscopy time of 45.3 +/- 15.9 min. Axillary artery access was used in 11 (73.3%) procedures. The mean total hospital stay was 5.6 +/- 2.8 days, and the postoperative follow-up was 35.4 months (range 2e120). The estimated IIA bridge stent patency at 1 year after operation was 100% and 85.7% +/- 13.2% 5 years postoperatively. One (6.7%) IIA branch was occluded, and this patient remained asymptomatic. One patient (6.7%) needed reintervention, and another (6.7%) patient had type II leakage, which is currently under close surveillance.Conclusions: Using an IBD to maintain the pelvic blood flow is an effective and feasible intra-vascular technique, especially for patients with an abnormal iliac artery anatomy. This novel technique has similar midterm procedural success rate compared to the use of commercial IBDs. Therefore, these devices are more suitable for patients with certain anatomic challenges and can be used as an alternative treatment.

Automated summary

This study describes the indications, efficacy, and safety of a new surgeon-modified iliac branch device (sm IBD). The results show that the sm IBD is an effective and feasible intra-vascular technique for patients with abnormal iliac artery anatomy and has similar midterm procedural success rate compared to commercial IBDs.