61288 20190709135531.0 doi 10.1016/j.jmbbm.2017.03.023 sideral 98325 ART-2017-98325 eng (orcid)0000-0002-3613-4209 Puértolas, S. Universidad de Zaragoza A methodology for the customized design of colonic stents based on a parametric model 2017 Access copy available to the general public Unrestricted The choice of necessary stent properties depends mainly on the length of the stenosis and degree of occlusion. So a stent design with variable radial stiffness along its longitudinal axis would be a good option. The design proposed corresponds to a tube-based stent with closed diamond-shaped cells made from a NiTi alloy. By acting independently on different geometric factors, variable geometries can be obtained with different radial force reactions. A design adjustment according to specific requirements, in order to get a better fit to ill-duct and reduces complications, is possible. A parametric analysis using finite element has been conducted to determine the influence of slot length, number of circumferential slots, tube thickness and shape-factor on stent mechanical behavior, which allow eliminating the need for extensive experimental work and knowing and quantifying the influence of those factors. The results of finite element simulations have been used, by means of least-squares fit techniques, to obtain analytical expressions for the main mechanical characteristics of the stent (Chronic Expansive Radial Force and Radial Compression Resistance) in terms of the different geometrical factors. This allows the stent geometry to be customized without launching an iterative and costly process of modeling and simulation for each case. info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 3.239 2017 ENGINEERING, BIOMEDICAL 18 / 78 = 0.231 2017 Q1 T1 MATERIALS SCIENCE, BIOMATERIALS 15 / 33 = 0.455 2017 Q2 T2 0.958 2017 Biomedical Engineering 2017 Q1 Mechanics of Materials 2017 Q1 Biomaterials 2017 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Navallas, D. (orcid)0000-0002-8643-7558 Herrera, A. Universidad de Zaragoza (orcid)0000-0003-2378-7187 López, E. Universidad de Zaragoza Millastre, J. (orcid)0000-0003-0785-4132 Ibarz, E. Universidad de Zaragoza (orcid)0000-0002-2934-1525 Gabarre, S. (orcid)0000-0002-3125-5802 Puértolas, J.A. Universidad de Zaragoza (orcid)0000-0001-7944-9625 Gracia, L. Universidad de Zaragoza 1004 830 Universidad de Zaragoza Dpto. Cirugía,Ginecol.Obstetr. Área Traumatología y Ortopedia 5002 305 Universidad de Zaragoza Dpto. Ingeniería Diseño Fabri. Área Expresión Gráfica en Ing. 5004 605 Universidad de Zaragoza Dpto. Ingeniería Mecánica Área Mec.Med.Cont. y Teor.Est. 5001 065 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Cienc.Mater. Ingen.Metal. 71 (2017), 250-261 J. mech. behav. boomed. mater. Journal of the Mechanical Behavior of Biomedical Materials 1751-6161 2699366 http://zaguan.unizar.es/record/61288/files/texto_completo.pdf Postprint 79528 http://zaguan.unizar.es/record/61288/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:61288 articulos driver 2019-07-09-12:02:26 ARTICLE