Abstract 17693: Fracture Potentials and Dynamic Flexibility of Peripheral Stents: Insights into Clinical Practice From Durability Tests Simulating Multi-loading Environments of Superficial Femoral and Popliteal Arteries

Introduction: Stent fracture is identified as one of the primal causes of restenosis in superficial femoral and popliteal artery. However, differences in fracture potentials due to stent platforms and other indicators for restenosis in the lesions without stent fracture have not been well understood yet. We aimed to assess fracture potentials and dynamic flexibility of peripheral stents using two types of multi-loading durability testers. Methods: Based on the referenced data of SFA deformations in spine and fetal positions, we developed a multi-loading durability tester exerting cyclic torsion of 2.8 degrees/cm and shortening of 12.7% simultaneously to the elastic SFA models incorporating stents. Because arteries are stretched in the body, the SFA models were extended for 10% in the shortened phase. Mechanical stiffness of the SFA models was adjusted to that of human femoral artery. We defined dynamic longitudinal flexibility of stent as (differences in stent length between extended and shortened phases ...