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http://dx.doi.org/10.3795/KSME-A.2004.28.7.915

Finite Element Analysis of Mechanical Properties of a Balloon-Expandable Stent  

Oh, Byung-Ki (충북대학교 대학원)
Cho, Hae-Yong (충북대학교 기계공학부)
Kim, Yong-Yun (충북대학교 기계공학)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.28, no.7, 2004 , pp. 915-922 More about this Journal
Abstract
A stent is small tube-like structure expanded into stenotic arteries to restore blood flow. The stent expansion behaviors define the effectiveness of the surgical operation. In this paper, finite-element method was employed to analyze expansion behaviors and fatigue life of a typical diamond-shaped balloon-expandable stent. Beyond safety considerations, this type of analysis provides mechanical properties that are often difficult to obtain by experiments. Mechanical properties of the stent expansion pressure, radial recoil, longitudinal recoil and foreshortening were simulated using commercial FEM code, ANSYS and fatigue life were estimated using NISAII ENDURE. The FEM results showed that the pressures necessary to expand the stent up to a diameter of 3mm, 4mm and 5mm were 0.75MPa, 0.82MPa and 0.97MPa. The fatigue lifes according to expansion diameter were 114${\times}$10$^{7}$cycles, 714${\times}$$^{6}$cycles and 163${\times}$10$^{6}$cycles. As a result, a finite element model used in this study can simulate expansion behaviors of stents and should be useful to design new stents or analyze actual stents.
Keywords
Balloon-Expandable Stent; Finite Element Analysis; Stenotic Artery; Surgical Operation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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