Analysis Of the Influence Of Endograft Geometry On Blood Hemodynamic In Abdominal Aortic Aneurysm
Date Issued
2012
Date
2012
Author(s)
Hsiang Huang, Chang
Abstract
Abdominal aortic aneurysm (AAA) is a balloon-like bulge in an abdominal artery that may be caused by infection or congenital weakening of the connective tissue component bring about artery wall elasticity fatigue. In severe aneurysm rupture, the patient died due to bleeding .At present the mainstream treatment of AAA is Endovascular aneurysm repair (EVAR), the stent graft implantation into AAA sac and blocking lesion to achieve therapeutic effect.
The size, geometry and curvature of AAA is different from person to person. The current commercially endograft is composed of main body and iliac leg. The geometry of the stent does not have a certain standard. As long as it achieve therapeutic effect, the length of main body can be longer or shorter. The two Complications of EVAR is including：
1. Intraprosthetic thrombosis and endograft limb obstruction.
2. Device migration.
This study,In response to these Complications, Analyze the Influence Of Endograft with different main body length On Blood Hemodynamic In AAA by CFD. Expect to find the best geometry design to reduce Intraprosthetic thrombosis and Device migration occurred.The results show that when blood flow deceleration, recirculation and vortex is easily formed in the downstream of main body leading to Intraprosthetic thrombosis and endograft limb obstruction. The longer length of main body, it is more easily formed. And the drag force making Device migration has nothing to do with the main body length.
Subjects
Abdominal aortic aneurys
Endovascular aneurysm repair
Thrombosis
Obstruction
Device migration
Vortex
Drag force
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-101-R99543080-1.pdf
Size
23.54 KB
Format
Adobe PDF
Checksum
(MD5):2aa706b137cb526e70435e5c198d2704