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

풍선확장식 스텐트의 기계적 특성에 대한 유한요소해석

  • Published : 2004.07.01


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.


Balloon-Expandable Stent;Finite Element Analysis;Stenotic Artery;Surgical Operation


  1. Martin, H., 2002, 'Numerical Investigation into Fatigue-behaviour of Balloon-Expandable Stent,' 13h30 Trials in progress/New concepts(Poster session)
  2. Finet, G., Cachard, C., Delachartre, Ph., Maurincomme, E. and J. Beaune, 1998, 'Artifacts in Intravascular Ultrasound Imaging During Coronary Artery Stent Implantation,' Ultrasound in Med & Biol., Vol. 24, No.6, pp. 793-802
  3. Francesco Migliavacca, Lorenza Petrini, Maurizio Colombo, Ferdinando Auricchio and Riccardo Pietrabissa, 2002, 'Mechanical Behavior of Coronary Stents Investigated Through the Finite Element Method,' Journal of Biomechanics, Vol. 35, No.6, pp. 803-806
  4. Auricchio, F., Loreto, M. Di and Sacco, E., 2000, 'Finite-Element Analysis of a Stenotic Artery Revascularization Through a Stent Insertion,' Computer Methods in Biomechanics and Biomedical Engineering, Vol. 00, pp. 1-45
  5. KIM, J.R. Rasmussen, 2001, 'Full-range Stress-Strain Curves for Stainless Steel Alloys,' ' The University of Sydney Research Report No R811, pp. 1-44
  6. Dumoulin, C. and Cochelin, B., 2000, 'Mechanical Behavior Modelling of Balloon-Expandable Stents,' Journal of Biomechanics, Vol. 33, No. 11, pp. 1461-1466
  7. Rieu, R. and Pelissier, R., 1991, ''In Vitro Study of Physiological Type Flow in a Bifurcated Vascular Prosthesis,' Journal of Biomechanics, Vol. 24, pp. 923-933
  8. Oh, S., Kleinberger, M. and McElhaney, J.H., 1994, 'Finite-Element Analysis of Balloon Angioplasty,' Medical and Biological Engineering and Computing, Vol. 32, pp. 108-114
  9. Jin-Hwan Kang, Young-Joo Kwon, Sang-Ho Park, Dae-Hee Han, Sang-Chul Lee, Myung-Ku Kim, Jeong-Duk Byun, Byoung-Jo Choi, Kyu-hyuk Shim, Young-Keun On, Min-Su Hyon and Sung-Koo Kim, 2001, 'In Stent Restenosis in Patient with Coronary Artery Disease,' 'J. Soonchunhyang Med Coll., Vol. 7, No.2, pp. 345-352
  10. European Standard EN12006-3, 1998, Non Active Surgical Implants - Particular Requirements for Cardiac and Vascular Implants - Part 3 : Endovascular devices
  11. Antonio Colombo, Goran Stankovic and Jeffrey W. Moses, 2002, 'Selection of Coronary Stents,' Jounal of American College of Cardiology, Vol. 40, No.6, pp. 1021-1033
  12. John P. Cheatham, 2001, 'Improved Stents for Pediatric Applications,' Progress in Pediatric Cardiology, Vol. 14, pp. 95-115
  13. Seung-Jung Park and Sung-Wook Park, 1995, 'Coronary Stent as Percutaneous Transluminal Coronary Angioplasty,' 'The Ulsan Univ. Med. J, Vol. 4, No. 1, pp. 9-14
  14. Andrew Farb, Allen P. Burke and Renu Virmani, 2001, 'Evaluation of Intravascular Stents,' Pathology Case Reviews, Vol. 6, No.6, pp. 256-264
  15. David Chua, S.N., Mac Donald, B.J. and Hashmi, M.S.J., 2002, 'Finite-Element Simulation of Stent Expansion,' Journal of Materials Processing Technology, 120, pp. 335-340