Cardiovascular Stent Development: to an Improved Realistic Life Cycle Simulation
Virginie Astier, Protomed
A stent is a wire metal mesh tube placed into an artery or blood vessel to hold the structure open. The stent is put over a balloon catheter and reduced to a small diameter. It's then moved into the area of the artery reduced section. When the balloon is inflated, the stent expands, locks in place and forms a scaffold. This holds the artery open. The stent stays in the artery permanently, holds it open, and improves blood flow.Today, FE simulations used to develop and optimize stents are mostly based on an imposed cylindrical displacement of the stent surface. It allows a first approximation of its behavior in compression and expansion. However, in real life the stent surface does not stay cylindrical. In order to obtain a better behavior, we developed a new method inspired by current surgical techniques. As it is done in real life, we use a balloon to deploy the stent. This method induces a more realistic deformation of the stent and allows a better optimization of its design in order to improve its capabilities.