| 摘要 |
A stent design reduces the likelihood of contact among structural members when the stent diameter is reduced before insertion into the body. In one approach, an undulating link has a J-shaped profile or has an angled portion on one side at the peak of the link, in order to reduce contact during crimping. The stent may also include structural features that improve such aspects as flexibility, the coatibility of a drug coating onto the stent, flare reduction, stent retention within the body and/or reduction of the minimum diameter of the stent during crimping. |
| 主权项 |
1. A flexible intravascular stent for use in a body lumen, comprising:
a plurality of cylindrical rings aligned along a common longitudinal axis and interconnected to form the stent, each cylindrical ring having a first delivery diameter and a second implanted diameter; at least some of the cylindrical rings each having a plurality of first peaks and second peaks, each of the peaks having a height, the second peaks being shorter than the first peaks; at least one undulating link attaching each cylindrical ring to an adjacent cylindrical ring, the undulating links having a width and a curved portion extending transverse to the stent longitudinal axis toward the second peak, the entire width of the curved portion having curvature along the length defining the curved portion; the first peaks and the second peaks extending axially in the same direction and not being connected to an undulating link; and at least one undulating link including a first arm which is substantially perpendicular to a longitudinal axis of the stent, the first arm being substantially straight and being connected to the curved portion, the at least one undulating link including a second arm having a first substantially straight portion which is substantially perpendicular to a longitudinal axis of the stent and a [second,] angled portion, the angled portion extending from the curved portion, wherein the angled portion of the second arm is adjacent to the second peak in the first delivery position and the entire width of the angled portion is substantially straight along the length defining the angled portion. |
