F. Di Puccio, P. Forte, and G. Guarneri (Italy)
Angioplasty, Vessel Biomechanics, Finite Element Method.
The present study describes some numerical simulations of the expansion phase of balloon angioplasty on renal arteries. In particular the interaction between the balloon and the biological tissue is investigated in detail on an idealized geometry of the artery, starting from a deflated condition of the balloon and varying parameters as the percentage of stenosis, plaque morphology, balloon size and interaction type between plaque and artery. Analyses have been carried out by means of the Finite Element code Ansys, mainly through two-dimensional models. In addition one 3D model has been set up and also an actual geometry obtained from CAT Dicom Data has been used. The mechanical properties of the biological tissues have been taken from the literature and both artery and plaque have been approximated as isotropic homogeneous solids, with an hyper-elastic behaviour. The properties of the balloon have been provided by the producer. Some correlations between simulations and clinical data have been tried, to estimate approximated values of the elastic properties of biological tissues.
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