Open Access
Article Number 06008
Number of page(s) 6
Section Applied Research and Applications: Testing and Modelling
Published online 01 September 2009
ESOMAT 2009, 06008 (2009)
DOI: 10.1051/esomat/200906008

Numerical simulation of Nitinol p eripheral stents: from laser-cutting to deployment in a patient specific anatomy

Michele Conti1, 2, Ferdinando Auricchio1, Matthieu De Beule2 and Benedict Verhegghe2

1  Structural Mechanics Department, Université degli Studi di Pavia, Pavia, Italy
2  Institute Biomedical Technology (IBiTech), Faculty of Engineering, Ghent University, Ghent, Belgium

Published online: 1 September 2009

The current clinical trend is to use percutaneous techniques, exploiting Nitinol self-expanding stents, to treat peripheral occluded vessels such as carotid or superficial femoral arteries. Although this class of stents addresses the biomechanical requirements (i.e. flexibility, kink resistance, etc.), it has been observed that many of these stents implanted in peripheral vessels are fractured. Numerical simulations have shown to be very useful in the investigation and optimization of stents and also to provide novel insights into fatigue/fracture mechanics. To date most finite element based stent simulations are performed in a straight simplified anatomy and neglect the actual deployment process; consequently there is a need for more realistic simulations taking into account the different stages of the stent design process and the insertion in the target anatomy into account. This study proposes a virtual framework to analyze numerically Nitinol stents from the laser-cutting stage to the deployment in a (patient specific) tortuous anatomy.

© Owned by the authors, published by EDP Sciences 2009