An analytical approach for the mechanical interaction of the self-expanding Cardiocoil stent with the stenosed artery is presented. The damage factor as the contact stress at the stent-artery interface is determined. The stent is considered as an elastic helical rod having a nonlinear pressure-displacement dependence, while the artery is modeled by an elastic cylindrical shell. An influence of a moderate relative thickness of the shell is estimated. The equations for both the stent and the artery are presented in the stent-associated helical coordinates. The computational efficiency of the model enabled to carry out a parametric study of the damage factor. Comparative examinations are conducted for the stents made of the helical rods with circular and rectangular cross sections. It was found, in particular, that, under same other conditions, the damage factor for the stent with a circular cross section may be two times larger than that for a rectangular one.
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April 2005
Article
The Cardiocoil Stent-Artery Interaction
Moshe Brand,
Moshe Brand
Department of Solid Mechanics, Materials and Systems, Faculty of Engineering, Tel Aviv University
, Ramat Aviv 69978, Israel
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Michael Ryvkin,
e-mail: arikr@eng.tau.ac.il
Michael Ryvkin
Department of Solid Mechanics, Materials and Systems, Faculty of Engineering, Tel Aviv University
, Ramat Aviv 69978, Israel
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Shmuel Einav,
Shmuel Einav
Department of Biomedical Engineering, Faculty of Engineering, Tel Aviv University
, Ramat Aviv 69978, Israel
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Leonid Slepyan
Leonid Slepyan
Department of Solid Mechanics, Materials and Systems, Faculty of Engineering, Tel Aviv University
, Ramat Aviv 69978, Israel
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Moshe Brand
Department of Solid Mechanics, Materials and Systems, Faculty of Engineering, Tel Aviv University
, Ramat Aviv 69978, Israel
Michael Ryvkin
Department of Solid Mechanics, Materials and Systems, Faculty of Engineering, Tel Aviv University
, Ramat Aviv 69978, Israele-mail: arikr@eng.tau.ac.il
Shmuel Einav
Department of Biomedical Engineering, Faculty of Engineering, Tel Aviv University
, Ramat Aviv 69978, Israel
Leonid Slepyan
Department of Solid Mechanics, Materials and Systems, Faculty of Engineering, Tel Aviv University
, Ramat Aviv 69978, IsraelJ Biomech Eng. Apr 2005, 127(2): 337-344 (8 pages)
Published Online: September 21, 2004
Article history
Received:
January 27, 2004
Revised:
September 10, 2004
Accepted:
September 21, 2004
Citation
Brand, M., Ryvkin, M., Einav, S., and Slepyan, L. (September 21, 2004). "The Cardiocoil Stent-Artery Interaction." ASME. J Biomech Eng. April 2005; 127(2): 337–344. https://doi.org/10.1115/1.1871194
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