EXPANDABLE DEFORMABLE SLIDE AND LOCK STENT

摘要

Various embodiments of radially expandable stents are disclosed. In some embodiments, the stent includes a bond backbone, slot backbone, and a circumferentially extending rail connected with the bond backbone and slidably engaged with the slot backbone. In some embodiments, the stent includes annular support rings that define a plurality of cells. The annular rings can be joined with cross members. A rail member can be connected with one of the cross members and slidably engaged with another of the cross members. In various embodiments, the rail member includes a locking mechanism to facilitate one-way expansion of the stent.

主权项

1. A radially expandable stent having longitudinal and circumferential axes, the stent comprising:
a plurality of rings arranged longitudinally to form a tubular body assembly, each ring comprising a circumferential sequence of cells, wherein:
each cell is longitudinally defined by a pair of deformable struts on a first longitudinal side and a second set of deformable struts on a second longitudinal side, the struts of the first pair set at an angle to one another and the struts of the second pair set at an angle to one another, the angle between each pair increasing as the stent is expanded from a compact configuration towards an expanded configuration; andat least one cell is circumferentially defined by a first cross member and a second cross member, the first cross member fixedly supporting a distal end of a rail member, the second cross member slidingly engaging a medial portion of the rail member; wherein the rail member slides circumferentially in a first direction with respect to the second cross member as the stent is expanded towards an expanded configuration; and wherein the medial portion of the rail member includes at least one tooth element configured to engage the second cross member so as to permit sliding in the first direction, and to engage the second cross member so as to resist sliding in an opposite second direction, so as to inhibit the stent from radially contracting.