Document Detail


Flexibility and trackability of laser cut coronary stent systems.
MedLine Citation:
PMID:  20131745     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Coronary stents are the most important supports in present day cardiology. Flexibility and trackability are two basic features of stents. In this paper, four different balloon-expandable coronary stent systems were investigated mechanically in order to compare their suitability. The coronary stent systems were assessed by measurements of stent flexibility as well as by comparison of forces during simulated stenting in a self-investigated coronary vessel model. The stents were cut by laser from a single tube of 316L stainless steel or L-605 (CoCr) cobalt chromium alloy. The one-and four-point bending tests were carried out to evaluate the stent flexibility E x I (Nmm(2)), under displacement control in crimped and expanded configurations. The flexibility of stents would be rather dependent on the design than on raw material. In general a more flexible stent needs lower tracking force during the implantation. The L-605 raw material stents need lower track force to pass through in the vessel model than the 316L raw material stents. The sort and long stents passed through the curved vessel model in different ways. The long stents nestled to the vessel wall at the outer arc and bent, while the short stents did not bend in the curve, only the delivery systems bent.
Authors:
Péter Szabadíts; Zsolt Puskás; János Dobránszky
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Publication Detail:
Type:  In Vitro; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Acta of bioengineering and biomechanics / Wrocław University of Technology     Volume:  11     ISSN:  1509-409X     ISO Abbreviation:  Acta Bioeng Biomech     Publication Date:  2009  
Date Detail:
Created Date:  2010-02-05     Completed Date:  2010-10-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101194794     Medline TA:  Acta Bioeng Biomech     Country:  Poland    
Other Details:
Languages:  eng     Pagination:  11-8     Citation Subset:  IM    
Affiliation:
Budapest University of Technology and Economics, Department of Materials Science and Engineering, Budapest, Hungary. szabadits@freemail.hu
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MeSH Terms
Descriptor/Qualifier:
Angioplasty, Balloon
Biomechanics
Chromium Alloys
Coronary Stenosis / therapy
Coronary Vessels*
Equipment Design
Humans
Lasers
Pliability
Stainless Steel
Stents* / standards
Chemical
Reg. No./Substance:
0/Chromium Alloys; 12597-68-1/Stainless Steel

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


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