A predictive study of the mechanical behaviour of coronary stents by computer modelling
| Autor: | Gabriele Dubini, Ferdinando Auricchio, Lorenza Petrini, Isabella Quagliana, Francesco Migliavacca, Valeria Montanari |
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| Rok vydání: | 2003 |
| Předmět: |
Materials science
Quantitative Biology::Tissues and Organs medicine.medical_treatment Physics::Medical Physics Finite Element Analysis Biomedical Engineering Biophysics Elastic recoil Blood vessel prosthesis Angioplasty Coronary stent medicine Humans Computer Simulation Diagnosis Computer-Assisted Angioplasty Balloon Coronary Computer simulation Models Cardiovascular Stent Blood flow Prognosis Coronary Vessels Finite element method Elasticity Blood Vessel Prosthesis Equipment Failure Analysis Treatment Outcome Stents Stress Mechanical Biomedical engineering |
| Zdroj: | Medical engineeringphysics. 27(1) |
| ISSN: | 1350-4533 |
| Popis: | Intravascular stents are small tube-like structures expanded into stenotic arteries to restore blood flow perfusion to the downstream tissues. The stent expansion is an important factor to define the effectiveness of the surgical procedure: it depends on the stent geometry and includes large displacements and deformations, geometric and material non-linearity. Numerical analyses seem appropriate to study such a complex behaviour after a free stent expansion. In this study the finite element method (FEM) was applied to a new generation coronary stent. Results from computations were compared with those from a laboratory experiment in terms of radial expansion and elastic recoil. By means of a scanning electronic microscopy the area of plastic deformation were also detected and compared with those obtained in the numerical simulation. Matching between the different measurements was quite satisfactory even if some discrepancies were present due to the absence of the balloon in the numerical model. |
| Databáze: | OpenAIRE |
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