Design optimization of biomedical stent under the influence of the radial pressure using FEM. (2021)

• Record Type: Journal Article
• Authors: Jerold John Britto, J.; Venkatesh, R.; Prabhakaran, R.; Amudhan, K.
• Is Part Of: Materials today. Volume 39:Part 4(2021)
• Page Start: 1332
• Page End: 1336
• Publication Date: 2021
• Subjects: Stent -- Dogboning -- Pulmaz-schatz -- Comsol -- FEM; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2020.04.567
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: Atherosclerosis problem is treated using stenting a percutaneous transluminal angioplasty method. During the process, a stent is deployed into the artery by using a balloon as an expander. The balloon is removed after deflation but the stent remains expanded to act as a scaffold and keeping the blood vessel open. In this paper, the non-uniform deformation of the stent and for shortening effect is simulated using Finite Element Simulation using COMSOL. The dog boning and foreshortening effects are simulated to change the geometry parameters for optimum performance of the study. The Palmaz Schatz stent model is used for this simulation. The stress evaluation is calculated using the FEM. The stent is expanded from an original diameter of 0.74 mm to a diameter of 2 mm in the middle section. The average displacement of the stent's inner radius is determined and a global equation is used to compute the corresponding applied pressure load. The longitudinal recoils are about −0.9%, the distal radial recoil is about 0.4% and the central radial recoil is about 0.7%.