Patent ID: 8900287
Filing Date: 2014-12-02
Classification: A61F,D04C,D10B

Abstract:
1. A catheter deliverable stent for treating an abdominal aortic aneurysm comprising: a continuous innermost tubular structure having a first length and comprising a first plurality of braided strands forming a first braid comprising a first shape memory alloy, the first braid of the continuous innermost tubular structure having a predetermined pick and pitch to define openings sufficiently large so as to not materially impede blood flow therethrough, the first braid extending from a first end of the innermost tubular structure to a second end of the innermost tubular structure; a continuous outer tubular structure having a second length less than the first length and comprising a second plurality of braided strands forming a second braid comprising a second shape memory alloy, the second braid of the continuous outer tubular structure having a predetermined pick and pitch to define openings sufficiently small so as to substantially preclude blood flow therethrough, the continuous outer tubular structure being in a coaxial relationship with and surrounding the continuous innermost tubular structure, wherein the continuous innermost tubular structure and the continuous outer tubular structure are both adapted to self expand and together form a composite tubular structure having a predetermined diameter; wherein a longitudinal stretching of the composite tubular structure reduces the outer diameter of the composite tubular structure sufficiently to allow the composite tubular structure to be loaded into a lumen of an intravascular delivery catheter, and wherein release of the composite tubular structure from the intravascular delivery catheter allows the composite tubular structure to self expand back to said predetermined diameter.