| 摘要 |
<p>The optimum stent mechanical model is designed for radical recovery of an arterial lumen and therefore for blood flow normalization. The stent (10) comprises a series of circular bands (17) disposed over a common longitudinal axis, each of the bands (17) consisting of diametrical deformation compensators (CDD) (19) and undeformable portions of circular surface (20). The adjacent circular bands (17) are connected by longitudinal deformation compensators (CLD) (19), disposed in an intermediate zone between the circular bands (17). The CDDs (16) and CLDs (23) are not kinematically connected in the optimum mechanical stent model. This means that the coronary artery dynamical mechanical forces and deformation will not be transferred from CLD (23) to CDD (19), and so the natural arterial dynamics will not be affected. Designing a given stent model, tailored to specific clinical demands, requires calculation of the dependencies for the indicated CDDs (19) and CLDs (23). In accordance with specific clinical requirements several different cardiovascular expandable stent models are claimed.</p> |
