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Radially-expandable stent with controllable force profile

  • US 6,613,079 B1
  • Filed: 02/05/1999
  • Issued: 09/02/2003
  • Est. Priority Date: 02/05/1998
  • Status: Expired due to Term
First Claim
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1. A radially expandable stent for implantation within a body lumen comprising:

  • an elongated generally tubular body defining a passageway having a longitudinal axis;

    the body comprising a plurality of circumferential support sections arranged successively along the longitudinal axis, each circumferential support section of the plurality of circumferential support sections having a longitudinal length along the longitudinal axis;

    each circumferential support section of the plurality of circumferential support sections comprising a plurality of primary bends interconnected by struts, the primary bends being located on alternating ends of each circumferential support section around the circumference of the body, the struts connecting successive primary bends on opposite ends of each circumferential support section, and further wherein at least some struts comprise a secondary bend proximate at least one longitudinal end of each of the at least some struts wherein the secondary bend is adapted to contact an adjacent secondary bend when the stent is compressed; and

    at least one longitudinal member connecting adjacent circumferential support sections in the body;

    wherein each of the circumferential support sections is radially compressible into a compressed diameter and radially expandable into an unrestrained expanded diameter in which the struts and the primary bends in each of the circumferential support sections are arranged in a zigzag pattern, and further wherein the longitudinal lengths of at least two of the circumferential support sections are different.

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