Biomechanical behaviour of coronary stent design with OCC technology

• Autorzy: Walke W. , Paszenda Z. , Jurkiewicz W.
• Konferencja: 12th International Scientific Conference CAM3S'2006, 27-30th November 2006, Gliwice-Zakopane
• Języki publikacji: EN

Abstrakty

EN

Purpose: The work presents results of stresses and strains of three-layer vascular stent (Cr-Ni-Mo - Ta - Cr-Ni-Mo) and one-layer uniform one (Cr-Ni-Mo) used in operative cardiology. Design/methodology/approach: On the basis of the geometrical model a finite element mesh was generated. The discretization process was realized with the use of the SOLID95 element. The set boundary conditions represented the phenomena which occur during baloon expanding. Findings: The numerical analysis of the three-layer stent showed diverse distribution of stresses and strains in the individual layers. Minimum stresses in the analyzed range of expansion diameters (d=2.25-3.50 mm) were observed in the middle layer made of tantalum. Maximum stresses were observed in the layer made of the stainless steel. Research limitations/implications: Values of stresses and strains in different stents' regions caused by applied displacements are valuable information for appropriate design of the geometry, hardening of the metallic biomaterial and forming of physio-chemical properties of surface layer. Originality/value: The obtained results are valuable for selection of surface layer which is mainly responsible for ensuring proper hemocompatibility of the stent. The deformable surface layer is an effective way to reduce the surface reactivity of the stent in blood environment and in consequence coagulation.

Słowa kluczowe

EN

metallic alloys; biomaterials; mechanical properties; computational mechanics

PL

stopy metaliczne; biomateriały; właściwości mechaniczne; metody komputerowe; mechanika

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 20, nr 1-2
• Strony: 199--202
• Opis fizyczny: Bibliogr. 17 poz., fot., rys., tab.

Twórcy

autor

Walke W.

autor

Paszenda Z.

autor

Jurkiewicz W.

• Division of Biomedical Engineering, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18 a, 44-100 Gliwice, Poland,

Bibliografia

• [1] Z. Paszenda, Forming of physico-chemical properties of coronary stents made of Cr-Ni-Mo steel applied in interventional cardiology. Printing House of the Silesian University of Technology, Gliwice, 2005, (in Polish).
• [2] Z. Paszenda, Issues of metal materiale used for implants in interventional cardiology. Engineering of Biomaterials, 21 (2002) 3-9.
• [3] Z. Paszenda, J. Marciniak, R. Będzinski, E. Rusinski, T. Smolnicki, Biomechanical characteristics of the stent coronary vessel system. Acta of Bioengineering and Biomechanics, 4 (2002) 81-89.
• [4] Z. Paszenda, J. Tyrlik-Held, J.Marciniak, Application of metallic biomaterials on implants in interventional cardiology. Proceedings of the Scientific Conference “Materials, Mechanical & Manufacturing Engineering”, Gliwice, 2000, 227-232.
• [5] Z. Paszenda, J. Tyrlik-Held, Corrosion resistance investigations of coronary stents made of Cr-Ni-Mo steel. Proceedings of the 10th Jubilee International Scientific Conference “Achievements in Mechanical and Materials Engineering 2001”, Gliwice-Krakow-Zakopane, 2001, 453-460.
• [6] M. Kaczmarek, J. Tyrlik-Held, Z. Paszenda, J. Marciniak, Stents characteristics in application and material aspect. Proceedings of the 12th International Scientific Conference „Achievements in Mechanical and Materials Engineering 2003”, Zakopane, 2003, 421-428.
• [7] W. Walke, Z. Paszenda, J. Marciniak, Optimization of geometrical features of coronary stent with the use of finite elements method. Proceedings of the 12th International Scientific Conference „Achievements in Mechanical and Materials Engineering 2003", Zakopane, 2003, 1011-1016.
• [8] A. Colombo, G. Stankovic, J. Moses, Selection of coronary stent. Journal of the American College of Cardiology, 6(2002) 1021-1033.
• [9] N. Chronos, C. Markou, J. Kocsis, G. Lianos. S. Hanson, Surface heparinization profoundly decreases acute thrombosis on Crown and Mini-Crown stents in the baboon arteriovenous shunt model. Journal of the American College of Cardiology, 2 (1998) 1163-77.
• [10] J.Y. Chen, Y. Leng, X.B. Tian, L.P. Wang, N. Huang, P.K. Chu, P. Yang, Antithrombotic investigation of surface energy and optical bandgap and haemocompatibility mechanism of Ti(Ta+5)02 thin films. Biomaterials, 23 (2002) 2545-2552.
• [11] Z. Paszenda, J. Tyrlik-Held, Usefulness of carbon layer on implants in interventional cardiology. Proceedings of the 11th International Scientific Conference. “Achievements in Mechanical and Materials Engineering 2002”, Zakopane, 2002,437-442.
• [12] J.Marciniak, Z. Paszenda, W. Walke, M. Karczmarek, J. Tyrlik-Held, W. Kajzer, Stents in minimal invasive surgery. Printing House of the Silesian University of Technology, Gliwice, 2006 (in Polish).
• [13] P. Serruys, M. Kutryk (ed.), Handbook of coronary stents., Martin Dunitz Ltd, 1998.
• [14] C. Dumoulin, B. Cochelin, Mechanical behaviour modeling of balloon-expandable stents. Journal of Biomechanics 33 (2000) 1461-1470.
• [15] J. Wentzel, D. Whelan et al, Coronary stent implantation changes 3-D vessel geometry and 3-D shear stress distribution. Journal of Biomechanics 33 (2000) 1287-1295.
• [16] F. Etave, G. Finet, M. Boivin, J. Boyer, G. Rioufol, G. Thollet, Mechanical properties of coronary stents determined by using finite element analysis. Journal of Biomechanics, 34 (2001) 1065-1075.
• [17] W. Walke, Z. Paszenda, J. Filipiak, Experimental and numerical biomechanical analysis of vascular stent. Journal of Materials Processing Technology 164-165 (2005) 1263-1268.