Comparative study on the mechanical properties of lower limb arterial stents under various deformation modes.
10.7507/1001-5515.202006028
- Author:
Tianqi WANG
1
;
Haiquan FENG
1
;
Kun WANG
1
Author Information
1. College of Mechanical Engineering, Inner Mongolia University of Technology, Hohhot 010051, P.R.China.
- Publication Type:Journal Article
- Keywords:
finite element method;
lower limb arterial stent;
mechanical properties;
nitinol alloy;
support stiffness
- MeSH:
Alloys;
Femoral Artery;
Finite Element Analysis;
Lower Extremity;
Mechanical Phenomena;
Prosthesis Design;
Stents;
Stress, Mechanical
- From:
Journal of Biomedical Engineering
2021;38(2):303-309
- CountryChina
- Language:Chinese
-
Abstract:
Lower extremity movement is a complex and large range of limb movement. Arterial stents implanted in lower extremity are prone to complex mechanical deformation, so the stent is required to have high comprehensive mechanical properties. In order to evaluate the mechanical property of different stents, in this paper, finite element method was used to simulate and compare the mechanical properties of six nitinol stents (Absolute Pro, Complete SE, Lifestent, Protégé EverFlex, Pulsar-35 and New) under different deformation modes, such as radial compression, axial compression/tension, bending and torsion, and the radial support performance of the stents was verified by experiments. The results showed that the comprehensive performance of New stent was better than other stents. Among which the radial support performance was higher than Absolute Pro and Pulsar-35 stent, the axial support performance was better than Complete SE, Lifestent and Protégé EverFlex stent, the flexibility was superior to Protégé Everflex stent, and the torsion performance was better than Complete SE, Lifestent and Protégé Everflex stent. The TTR2 type radial support force tester was used to test the radial support performance of 6 types, and the finite element analysis results were verified. The mechanical properties of the stent are closely related to the structural size. The result provides a reference for choosing a suitable stent according to the needs of the diseased location in clinical applications.
