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US 2014/0135906 A1Published application
Tapered tubular implant formed from woven fabric
AssigneeSecant Medical, LLC
InventorsSeth Winner, Jack Coy
Life of this patent
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Abstract
A tubular woven implantable graft having a tapered section is provided. The graft comprises a first diameter and a second diameter and has a generally constant number of warp yarns per inch adjacent both the first diameter and the second diameter. A method for producing an implantable woven graft is also provided. The method includes weaving a first section having a first diameter and a tapered diameter tapering from the first diameter to a second diameter. During weaving of the tapered section a number of warp yarns are dropped from the weave and compressive forces are applied to the fabric to narrow the width of the fabric.
Claims30
A method for forming an implantable textile lumen, comprising the steps of:
- weaving a flat tubular textile having a front face and a back face, wherein the textile is formed of a plurality of warp yarns comprising base yarns and supplemental yarns, and wherein the textile comprises a tapered section in which the width of the textile changes from a first width to a second width, wherein weaving the tapered section comprises the steps of:
- dropping a plurality of the supplemental warp yarns from the weaving pattern by raising or lowering the plurality of supplemental warp yarns and maintaining the plurality of supplemental warp yarns in a raised or lowered position while raising and lowering the base yarns to weave the textile so that the plurality of supplemental warp yarns protrude from the textile across the width of the textile;
- and
- applying compressive force to the width of the textile after the step of dropping a plurality of supplemental warp yarns;
- and
- trimming the dropped yarns protruding from the textile to form a hollow woven textile lumen having an integrally woven tapered section wherein the number of warp yarns per inch woven in the tapered section at the first width is similar to the number of warp yarns per inch woven in the tapered section at the second width.
3 more elements
An implantable woven graft, comprising:
- a first tubular section wherein the first section comprises a fabric woven from a plurality of base yarns and a plurality of supplemental yarns, wherein the first section has a first diameter and a number of warp yarns per inch;
- a frustoconically-shaped hollow tapered section having a first diameter that is similar to the first diameter of the first tubular section, wherein the tapered section comprises a fabric woven from the base yarns forming the first tubular section and a plurality of the supplemental yarns, wherein the plurality of supplemental yarns are dropped from the weave pattern in the tapered section so that ends of the plurality of supplemental yarns protrude from the surface of the tapered section, wherein the protruding yarns are spaced apart from one another around the circumference of the tapered section and wherein the number of warp yarns per inch at the second diameter is similar to the number of warp yarns per inch at the first diameter.
A method for weaving a tubular implant having a tapered section, comprising the steps of:
- drawing a plurality of warp yarns through a loom to form a sequence of warp yarns having a width, wherein the warp yarns comprise a first set of yarns, a second set of yarns and a third set of yarns wherein the second and third sets of yarns are interspersed among the first set of yarns across the width of the sequence so that a portion of the second and third yarns are positioned adjacent the middle of the sequence of the yarns;
- passing the first, second and third sets of warp yarns through a reed having a first width;
- weaving weft yarn with the first, second and third sets of warp yarns to create a tubular fabric having a first diameter;
- weaving a first transition section in which the diameter of the tubular fabric changes from the first diameter to a second diameter, wherein the step of weaving the first transition section comprises controlling the position of the first set of warp yarns to simultaneously drop the warp yarns from the weave so that the weft yarns weave with the second and third sets of weft yarns in the first transition section without weaving the first set of warp yarns;
- and
- reducing the width of the reed from the first width to a second width while weaving the first transition section;
- weaving a second transition section in which the diameter of the fabric changes from a second diameter to a third diameter wherein the step of weaving the second transition comprises the steps of:
- controlling the position of the second set of warp yarns to simultaneously drop the second set of warp yarns from the weave so that the weft yarns weave with the third set of warp yarns in the second transition section;
- and
- reducing the width of the reed from the second width to a third width while weaving the second transition section;
- mounting the woven graft onto a forming element;
- and
- heating the woven graft to deform the graft into the shape of the forming element.
10 more elements
Dependencies are inferred from the claim text.