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Implantable vascular and endoluminal stents and process of fabricating the same

  • US 5,843,117 A
  • Filed: 02/14/1996
  • Issued: 12/01/1998
  • Est. Priority Date: 02/14/1996
  • Status: Expired due to Term
First Claim
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1. A vascular or endoluminal stent adapted to be expanded from a small diameter production state to a larger diameter deployed state for deployment in a vessel or tract of a patient to maintain an open lumen therein, said stent comprising a biocompatible hollow tube with a multiplicity of openings through an open-ended tubular wall thereof, said openings having a closed oval shape when said stent is in the production state, according to the shape of a plurality of serpentine elements bounding said openings within at least a substantial portion of said wall and running circumferentially in juxtaposed sine wave patterns, each of uniform multiple cycles, wherein adjacent ones of said patterns are offset 180 degrees out of phase from each other about the circumference of the tubular wall, are directly connected together without intervening bridges at the most closely confronting points of each pair of out of phase cycles of adjacent ones of the sine wave patterns, and are uniformly displaced longitudinally along an axis of the tube, said tube constituting a single member from which the entire stent is fabricated,wherein the uniform longitudinal displacement of the circumferential substantially sine wave-like patterns is interrupted at least once along the axis of the stent by transversely oriented serpentine elements that run longitudinally within said wall in juxtaposed at least partial substantially sine wave-like patterns having openings through the wall which are shaped according to the transversely oriented serpentine elements, adjacent ones of the transverse patterns being offset from each other by a 180°

  • cyclical phase difference at interconnecting points therebetween along the circumference of the tube, said transversely oriented serpentine elements being adapted to maintain the length of said tube substantially invariant with radial expansion of the stent.

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