| 摘要 |
An intraluminal scaffold (100) is described which comprises: a plurality of hoop components (102) being configured to be the primary radial load-bearing elements of the intraluminal scaffold; and one or more connector elements (104) having at least one substantially longitudinally oriented strut member. The one or more connector elements connect adjacent hoop components to form a substantially tubular structure having a luminal surface and an abluminal surface The at least one substantially longitudinally oriented strut member has a predetermined wall thickness, wherein the wall thickness is defined by the radial distance between the luminal surface and the abluminal surface, and a predetermined feature width. An area bounded by the wall thickness and the feature width comprises a plurality of zones undergoing at least one of tensile, compressive or substantially zero stress change due to external loading. The at least one substantially longitudinally oriented strut member is fabricated from a metallic material processed to have a microstructure with a granularity of about 32 microns or less and at least one internal grain boundary within the bounded area. |
