Geometrical enhancements for abdominal aortic stent-grafts.
作者： David S. Molony , Anthony Callanan , Liam G. Morris , Barry J. Doyle , Michael T. Walsh
DOI: 10.1583/08-2388.1
关键词: Secondary flow 、 Drag 、 Aortic aneurysm 、 Abdominal aortic aneurysm 、 Endovascular aneurysm repair 、 Shear stress 、 Mathematics 、 Biomedical engineering 、 Stent 、 Blood vessel prosthesis
摘要: Purpose:To compare the function of 2 stent-graft designs for endovascular abdominal aortic aneurysm repair.Methods:Computational fluid dynamics was used to investigate performance a conventional versus one with novel tapered configuration (equal area ratios at inlet and bifurcation). Idealized geometries (uniplanar) were formed first both devices. To mimic clinical setting pulsatile blood flow, realistic model (multiplanar) created based on computed tomography scans from 3 patients different geometries. A similar by mimicking deployment through its centerline.Results:The demonstrated reduced secondary flow vortices wall shear stresses in iliac limbs compared graft idealized scenario. The drag forces models designs, though stent...
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