Objective: To analyze the relationship between the anatomic features of the iliac arteries in Chinese patients with abdominal aortic aneurysms (AAA) involving the iliac arteries and the applicability of iliac branch devices (IBDs) through a single-center clinical investigation. 
Methods: The clinical data of 58 patients with AAA involving bilateral or unilateral iliac arteries admitted in the Department of Vascular Surgery of Affiliated Zhongshan Hospital, Fudan University from July 2015 to March 2017 were reviewed. The imaging data of the patients were analyzed using a three-dimensional workstation, and the relevant variables were measured. According to the instructions for use based on anatomic distinctions, the applicability of two types of IBDs (Cook IBD, Gore IBE) among these patients and their restricting factors were analyzed.
Results: Of 58 AAA patients, bilateral common iliac arteries were affected in 49 cases and unilateral common iliac artery was affected in 9 cases. The mean length of affected common iliac artery was (57.9±18.1) mm for the left common iliac artery and (56.7±17.4) mm for the right common iliac artery, with the mean diameter of (17.7±7.2) mm for the left common iliac artery and (25.1±9.4) mm for the right common iliac artery, respectively. Based on the instructions for use of the two types of IBDs, the ratio of applicability in the affected iliac arteries was 26.1% (28/107) for Cook IBD and 20.6% (22/107) for Gore IBE. The main restricting factor for Cook IBD was the diameter of the internal iliac artery9 mm (50/107, 46.7%), and the most common reason for exclusion from Gore IBE was the diameter of the common iliac artery <25 mm (67/107, 62.6%).
Conclusion: The applicability of anatomic criteria-based IBDs in Chinese patients with AAA aneurysms involving the iliac arteries is relatively low. The unconformities in the diameters of the common iliac artery and internal iliac artery are the main restricting factors for their use.