title: On the effects of different strategies in modelling balloon-expandable stenting by means of finite element method.
abstract: In recent years, computational structural analyses have emerged as important tools to investigate the mechanical response of stent placement into arterial walls. Although most coronary stents are expanded by inflating a polymeric balloon, realistic computational balloon models have been introduced only recently. In the present study, the finite element method is applied to simulate three different approaches to evaluate stent-free expansion and stent expansion inside an artery. Three different stent expansion modelling techniques were analysed by: (i) imposing a uniform pressure on the stent internal surface, (ii) a rigid cylindrical surface expanded with displacement control and (iii) modelling a polymeric deformable balloon. The computational results showed differences in the free and confined-stent expansions due to different expansion techniques. The modelling technique of the balloon seems essential to estimate the level of injury caused on arterial walls during stent expansion.
authors: Laboratory of Biological Structure Mechanics, Department of Structural Engineering, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milan, Italy. francesca.gervaso@polimi.it
authors: Francesca
authors: F
authors: Gervaso
authors: Claudio
authors: C
authors: Capelli
authors: Lorenza
authors: L
authors: Petrini
authors: Simone
authors: S
authors: Lattanzio
authors: Luca
authors: L
authors: Di Virgilio
authors: Francesco
authors: F
authors: Migliavacca
mesh_terms: D015906:Angioplasty, Balloon, Coronary; D003331:Coronary Vessels / Q000502:physiology; D020342:Finite Element Analysis; D008955:Models, Cardiovascular; D015607:Stents