| 摘要 |
A flexible stent is provided that has features to minimize recoil and facilitate anchoring of the stent in a vascular passage. The design features sharp angulated bends (8). Other features include a rounded cross section in the wire (1) or stent component. Another feature is the bending of the angulated bends (8) in a transverse plane to provide additional rigidity and an anchoring mechanism. Ties (3) are provided in alignment or in a staggered fashion, either semirigid or flexible, to allow the structure, which can be made of joined rings (20), or a helical arrangement, to be more flexible to accommodate bends in the vascular system. The ties (3) are also disclosed with a locking system involving bending the wire (1) as it is formed into a helix in combination with crosstie (60) with loops (96) which lock the stent in an expanded position. |
