Document Detail


Shape optimization of stress concentration-free lattice for self-expandable Nitinol stent-grafts.
MedLine Citation:
PMID:  22304844     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
In a mechanical component, stress-concentration is one of the factors contributing to reduce fatigue life. This paper presents a design methodology based on shape optimization to improve the fatigue safety factor and increase the radial stiffness of Nitinol self-expandable stent-grafts. A planar lattice free of stress concentrators is proposed for the synthesis of a stent with smooth cell shapes. Design optimization is systematically applied to minimize the curvature and reduce the bending strain of the elements defining the lattice cells. A novel cell geometry with improved fatigue life and radial supportive force is introduced for Nitinol self-expandable stent-grafts used for treating abdominal aortic aneurism. A parametric study comparing the optimized stent-graft to recent stent designs demonstrates that the former exhibits a superior anchoring performance and a reduction of the risk of fatigue failure.
Authors:
Ehsan Masoumi Khalil Abad; Damiano Pasini; Renzo Cecere
Related Documents :
3922024 - Endothelium influences coronary and aortic vasomotion by release of an unstable humoral...
7165854 - Effects of kinins on isolated blood vessels. role of endothelium.
8904614 - 5-ht1d receptor agonists and human coronary artery reactivity in vitro: crossover compa...
3404774 - Hepatic veins belong to "the veins of the digestive tube" in the dog.
16844634 - Prone positioning to treat acute severe pulmonary edema in the post-cardiac surgical pa...
2324804 - Multiple middle cerebral artery aneurysms in an infant. case report.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-2-2
Journal Detail:
Title:  Journal of biomechanics     Volume:  -     ISSN:  1873-2380     ISO Abbreviation:  -     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-2-6     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0157375     Medline TA:  J Biomech     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier Ltd. All rights reserved.
Affiliation:
Mechanical Engineering Department, McGill University, Montreal, Quebec, Canada.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Transducer and base compliance alter the in situ 6 dof force measured from muscle during an isometri...
Next Document:  The pediatric upper limb motion index and a temporal-spatial logistic regression: quantitative analy...