| Physical properties of endovascular stents: an experimental comparison. | |
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MedLine Citation:
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PMID: 10834499 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: Different endovascular stent types (AVE Bridge, AVE Bridge X, Memotherm, Palmaz Large, Palmaz Medium, Palmaz-Schatz Long-Medium, Perflex, S.MA.R.T., Symphony, and Wall-stent) of 4 cm length and 8 mm diameter were subjected to standardized physical tests. MATERIALS AND METHODS: The metal mass of each stent was assessed by weighing. The balloon-expandable stents were pneumatically tested for hoop strength. In self-expanding stents, radial resistive force and chronic outward force were determined with use of a loop test. Stent delivery system pushability was assessed in a crossover model. Stent radiopacity was analyzed quantitatively. RESULTS: The hoop strength of the balloon-expandable stents ranged from 15.8 N/cm (Perflex) to 28.9 N/cm (AVE Bridge X). The stent weight increased with greater hoop strength (Perflex, 0.046 g/cm vs. AVE Bridge X, 0.061 g(cm). The self-expanding stents had a radial resistive force between 0.39 N/cm (Wallstent) and 1.7 N/cm (Smart). The flexible balloon-expandable stents showed pushability values between 0.13/N (AVE Bridge) and 0.20/N (Perflex). The self-expanding stents had flexibilities between 0.13/N (Memotherm) and 0.24/N (Symphony). Radiopacity assessed with use of a phantom simulating the iliac region ranged from 92 (Palmaz Large) to 115 (AVE Bridge) on a 256-point gray scale (0 = black, 256 = white). CONCLUSIONS: There is no stent with ideal physical properties. However, depending on the characteristics of the arterial lesion to be treated, the most appropriate stent can be chosen. |
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Authors:
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S H Duda; J Wiskirchen; G Tepe; M Bitzer; T W Kaulich; D Stoeckel; C D Claussen |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Journal of vascular and interventional radiology : JVIR Volume: 11 ISSN: 1051-0443 ISO Abbreviation: J Vasc Interv Radiol Publication Date: 2000 May |
Date Detail:
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Created Date: 2000-08-30 Completed Date: 2002-10-09 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 9203369 Medline TA: J Vasc Interv Radiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 645-54 Citation Subset: IM |
Affiliation:
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Department of Radiology, Eberhard-Karls-Universität Tübingen, Germany. stephan.duda@t-online.de |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Alloys Blood Vessel Prosthesis Equipment Design Physical Phenomena Physics Stainless Steel Stents* / standards |
| Chemical | |
Reg. No./Substance:
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0/Alloys; 12597-68-1/Stainless Steel; 52013-44-2/nitinol |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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