| Hemodynamic variations due to spiral blood flow through four patient-specific bifurcated stent graft configurations for the treatment of abdominal aortic aneurysms. | |
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MedLine Citation:
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PMID: 23255342 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Endovascular repair is now a recognised procedure for treating abdominal aortic aneurysms. However, post-operative complications such as stent graft migration and thrombus may still occur. To assess these complications numerically, the correct input boundary conditions, which include the full human aorta with associated branching, should be included. Four patient-specific computed tomography scanned bifurcated stent grafts (SGs) were modelled and attached onto a full human aorta, which included the ascending, aortic arch and descending aortas. Two of the SG geometries had a twisted leg configuration, while the other two had conventional nontwisted leg configurations. Computational fluid dynamics was completed for both geometries and the hemodynamics assessed. The complexity of the flow patterns and secondary flows were influenced by the inclusion of the full human aorta at the SG proximal section. During the decelerating phase significant recirculations occurred along the main body of all SG configurations. The inclusion of the full human aorta did not impact the velocity contours within the distal legs and there was no difference in drag forces with the SG containing the full human aorta and those without. A twisted leg configuration further promoted a spiral flow formation along its distal legs. Copyright © 2012 John Wiley & Sons, Ltd. |
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Authors:
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Florian Stefanov; Tim McGloughlin; Patrick Delassus; Liam Morris |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-12-18 |
Journal Detail:
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Title: International journal for numerical methods in biomedical engineering Volume: - ISSN: 2040-7947 ISO Abbreviation: Int j numer method biomed eng Publication Date: 2012 Dec |
Date Detail:
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Created Date: 2012-12-20 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101530293 Medline TA: Int j numer method biomed eng Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 John Wiley & Sons, Ltd. |
Affiliation:
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Galway Medical Technologies Centre (GMedTech), Department of Mechanical and Industrial Engineering, Galway Mayo Institute of Technology, Galway, Ireland. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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