Influence of the folded balloon geometry on the Crimping process of Stents

Tobias Anderson Guimarães, Rogério Araújo, Sônia Aparecida Goulart Oliveira

Resumo


Nowadays, the use of stents during the angioplasty process is a common practice for the artery restenosis. Usually, the structural integrity of the balloon and stent are studied based on the numerical simulation using the finite elements method. In most cases, the geometry of the balloon is considered as a cylinder with thickness constant. However, the balloon is folded before the angioplasty. In this context, the objective of this work is to study the influence of the stress caused by the crimping process in the structural integrity of the stent and the balloon. For the simulation of the crimping process, the geometry of the expandable balloon was considered as a cylinder with folds. This geometry was considered in order to model the balloon without internal pressure before the deployment of the stent. The results have proved that the folded balloon stress distribution caused by the crimping process should be take account in the analysis of the structural integrity of the stent and balloon. 

Palavras-chave


Angioplasty; Crimping; Finite elements method; Stents.

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Referências


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DOI: https://doi.org/10.18554/rbcti.v4i1.3412

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