Abstract：
:Polymeric stents can be considered as an alternative to metallic stents thanks to their lessened incidence of restenosis and controlled deployment. The purpose of this study was to investigate the feasibility of developing a temperature-responsive braided stent using shape memory polyurethane (SMPU) through finite element analysis. It was assumed that braided stents were manufactured using SMPU fibers. The mechanical behavior of SMPU fibers was modeled using a constitutive equation describing their one-dimensional thermal-induced shape memory behavior. Then, the braided stents were analyzed to investigate their mechanical behavior using finite element analysis software, in which the constitutive equation was implemented through a user material subroutine. The diameter of the SMPU fibers and braiding angle were chosen as the design parameters and their values were adjusted to ensure that the mechanical properties of the braided polymer stents match those of metallic stents. Finally, the deployment process of the braided stents inside narrowed vessels was simulated, showing that the SMPU stents can be comfortably implanted while minimizing the overpressure onto the vessel walls, due to their thermo-responsive shape memory behavior.
journal_name
J Biomechjournal_title
Journal of biomechanicsauthors
Kim JH,Kang TJ,Yu WRdoi
10.1016/j.jbiomech.2009.10.032subject
Has Abstractpub_date
2010-03-03 00:00:00pages
632-43issue
4eissn
0021-9290issn
1873-2380pii
S0021-9290(09)00606-Xjournal_volume
43pub_type
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