| 摘要 |
<p>A radially expandible intra vascular stent (20) is provided with improved radially expandible strength due to increased amounts of metal surface area while flexibility is increased due to the unique stent wall surface pattern. In the un-expended form, the stent wall surface pattern (58) resembles a series of linked S-shapes (22) formed radially about the tube with interconnections (21) between the radial rows of S's (22) with alternating adjacent S's. Longitudinally, the un-expanded stent resembles longitudinal rows of pattern series of an S (24), S (24), reverse S (26), reverse S (26) shapes. This series repeats itself along the longitudinal surface of the stent. The longitudinal pattern is interconnected by the radial S's (21). When expanded for implantation within a lumen wall, the stent (20) unfolds to wall surface pattern (60) having linked parallelograms (52) along its longitudinal axis (40) while radially having alternating connected and disjoined struts forming a pattern similar to a butterfly shape (56), along its radial axis (50). The stent (20) can be non-uniform when expanded to accommodate the unique size and shape of the lumen into which it is implanted. The narrow outside diameter of the un-expanded stent eliminates the usual preliminary lumen expansion step. A multi-layer stent (70) is also provided. A method of implantation and a method of manufacture are also provided.</p> |
