Abstract

Info

Title:: Finite element evaluation of stents for transcatheter mitral valve replacement

Author(s):: CHEN Yiran1; HE Zhaoming1; 2; 1. Department of Biomedical Engineering, Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China 2. Department of Mechanical Engineering, Texas Tech University, Lubbock 79409, USA

Keywords:: Keywords: transcatheter mitral valve replacement mitral valve stent finite element analysis

Abstract:: Abstract: Objective To propose a stent design for transcatheter mitral valve replacement, and to evaluate the deformation caused by the interaction between the stent and the valve leaflets in vivo and analyze its mechanical behavior. Methods The finite element method was used to establish a composite model of the stent and leaflets, and a pressure load was applied on the leaflets to simulate its closing process in the human body. The stent deformation, stress-strain results, and fatigue life affected by the pressure load were analyzed. Results The maximum apical displacement of the stent was about 0.24 mm, and the fatigue life under periodic strain was about 2.05×108 times. Conclusion The degree of stent deformation is acceptable but should not to be neglected. Considering only the periodic traction of the valve leaflets on the stent, the stent can work normally for 4-9 years.