Abstract
Endovascular aneurysm repair (EVAR) is the main treatment for patients with abdominal aortic aneurysms. This study examines the relationship between the migration of the distal landing zone and the length of the landing zone. The subjects of this study were 36 patients who underwent contrast-enhanced computed tomography 1year after EVAR. We constructed curved multi-planar reconstruction imaging and measured the length of migration, the angle of the common iliac artery, and the diameter of the distal landing zone. The mean length of migration was 1.2±1.7mm. Fifty-four legs had a distal landing zone of over 15mm and 18 legs had a distal landing zone of less than 15mm. Four (7.4%) of the 54 legs with a landing zone of over 15mm and 3 (16.7%) of the 18 legs with a landing zone of less than 15mm had migration of over 3mm. This difference was significant (P=0.05). The rate of migration on the distal landing zone 1year after EVAR was reasonable when the length of the landing zone was about 15mm. It is possible that significant migration can occur in patients with distal landing zones less than 10mm in length.
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