自己拡張ステントの変形に対する構成材料の影響

抄録

This study focused on the shape memory alloy used for the structural material of self-expanding stents and examined their effects on deformation by finite element method (FEM) analysis. Though the NiTi alloy is widely used for the selfexpanding stent, the research of the alternative material is being carried out, due to Ni having strong toxicity and may cause metal allergy. In this study, deformation analysis of self-expanding stents using Fe alloy, Cu alloy and Ti alloy without Ni were carried out, and the applicability of those materials to the self-expanding stent was examined. It was found that CuAlMn alloy and TiNbZr alloy can be a sufficient substitute for NiTi considering advantages such as low cost and safety.