MODEL OF MECHANICAL PROPERTIES OF NITINOL STENT

Abstract − Stents and stentgrafts are used in last years very often, especially for treatment of stenosis and aneurisma of vessels. But there are some possible risks, when stents are applicated. The stent can migrate inside a vessel, it can be leaky or deformed. To investigate interaction between stent and a wall of vessel we must have model of mechanical properties of the vessel and of the stent. As to the vessels a lot of models were designed [1], [2] but as to the stents, the situation is worse. So we have decided to try to develop our own model based on the knowledge of material parameters of nitinol, of the geometry of stent and of its segments