Time-related alterations in shape, position, and structure of self-expanding, modular aortic stent-grafts: a 4-year single-center follow-up.

摘要: Purpose:To report the nature and ramifications of structural positional changes over time in tube modular bifurcated aortic stent-grafts.Methods:Two hundred ninety-one patients received endovascular grafts (primarily Stentor/Vanguard) between August 1994 1998. Follow-up surveillance (clinical laboratory examination, biplanar noncontrast radiography, contrast-enhanced computed tomography) has been maintained on all for 4 years. Changes configuration position endografts have noted their sequelae charted.Results:Three types endograft shape documented: mild — slight distortions visible plain radiographs (n = 90, 31.0%), significant angulations reaching 60° to 90° 65, 22.3%), severe ≥ 10, 3.4%). never gave rise late migration at proximal attachment site, whereas distal ends, easily retracted from iliac arteries 8). Structural altera...