| Thermomechanical properties, collapse pressure, and expansion of shape memory polymer neurovascular stent prototypes. | |
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MedLine Citation:
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PMID: 19107804 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Shape memory polymer stent prototypes were fabricated from thermoplastic polyurethane. Commercial stents are generally made of stainless steel or other alloys. These alloys are too stiff and prevent most stent designs from being able to navigate small and tortuous vessels to reach intracranial lesions. A solid tubular model and a high flexibility laser etched model are presented. The stents were tested for collapse in a pressure chamber. At 37 degrees C, the full collapse pressure was comparable to that of commercially available stents, and higher than the estimated maximum pressure exerted by intracranial arteries. However, there is a potential for onset of collapse, which needs further study. The stents were crimped and expanded, the laser-etched stent showed full recovery with an expansion ratio of 2.7 and a 1% axial shortening. |
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Authors:
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Géraldine M Baer; Thomas S Wilson; Ward Small; Jonathan Hartman; William J Benett; Dennis L Matthews; Duncan J Maitland |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Journal of biomedical materials research. Part B, Applied biomaterials Volume: 90 ISSN: 1552-4981 ISO Abbreviation: J. Biomed. Mater. Res. Part B Appl. Biomater. Publication Date: 2009 Jul |
Date Detail:
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Created Date: 2009-06-09 Completed Date: 2009-10-02 Revised Date: 2011-07-20 |
Medline Journal Info:
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Nlm Unique ID: 101234238 Medline TA: J Biomed Mater Res B Appl Biomater Country: United States |
Other Details:
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Languages: eng Pagination: 421-9 Citation Subset: IM |
Copyright Information:
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(c) 2008 Wiley Periodicals, Inc. |
Affiliation:
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Department of Biomedical Engineering, University of California Davis, Davis, California 95616, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Models, Theoretical Neovascularization, Physiologic* Polymers* Pressure Stents* |
| Grant Support | |
ID/Acronym/Agency:
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R01 EB000462-07/EB/NIBIB NIH HHS; R01EB000462/EB/NIBIB NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Polymers |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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