Chinese Journal of Tissue Engineering Research ›› 2010, Vol. 14 ›› Issue (30): 5581-5585.doi: 10.3969/j.issn.1673-8225.2010.30.018

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Optimal design of intravascular stent arc-strut element structure based on biomechanical performance

Lao Yong-hua, Zhi Xiao-xing, Lin Ze-feng, Li Xiao-nin, Cen Ren-jing, Huang Yue-shan   

  1. School of Bioscience and Engineering, South China University of Technology, Guangzhou  510006, Guangdong Province, China
  • Online:2010-07-23 Published:2010-07-23
  • Contact: Huang Yue-shan, Doctor, Associate professor, School of Bioscience and Engineering, South China University of Technology, Guangzhou 510006, Guangdong Province, China bmbyshan@scut.edu.cn
  • About author:Lao Yong-hua☆, Studying for doctorate, Lecturer, School of Bioscience and Engineering, South China University of Technology, Guangzhou 510006, Guangdong Province, China yhlao@scut.edu.cn
  • Supported by:

    the Basic Scientific Research of Central High Institutes, South China University of Technology, No. 2009ZM0075*

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Abstract:

BACKGROUND: Support the expansion of blood vessels in the implanted process of requires stent structure with complex biomechanical properties. The structure can achieve optimal overall performance by integrated multi-objective optimization.
OBJECTIVE: Based on designs of various intravascular stent structures, the features parameters were extracted for optimization analysis of biomechanics.
METHODS: Based on the analysis of biomechanical behavior: metal-based coverage, the maximal stent stress of expansion, maximal stent radius of expansion, axial recoil rate, radial recoil rate, finite element analysis software ADINA was used to establish 81 stent structures of closed, parallel, and open-arc strut element with different circumstantial unit number, arc-strut width and axial length of the stent unit element; the non-dimensional method and multi-objective optimum ranking was used to analyze the stent biomechanical behavior.
RESULTS AND CONCLUSION: Results showed that mixture structure of stent with closed, parallel, and open-arc strut element can be designed, and that the structure possesses mainly large axial length of the stent’s closed, parallel strut element and small arc-strut width uniformly. It is significantly important for the stent structural design and mechanical behavior evaluation system.

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