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US 6,547,820 B1Granted
High profile fabric graft for arteriovenous access
AssigneeSciMed Life Systems, Inc.
InventorMarianne W. Staudenmeier
Life of this patent
Estimating the term…
Abstract
A fabric graft having a high external velour profile is provided. The textile graft may be woven or knitted to form a tubular prosthesis. The high external velour profile is provided by outwardly extending loops ranging from about 1 mm to about 5 mm in length. The fabric graft is self-sealing to minimize bleeding after puncture by a dialysis needle.
Claims26
A synthetic fabric tubular vascular graft comprising:
- a first tubular fabric layer having a pattern of yarns interlaced to form a smooth inner surface and an opposed outer surface;
- and
- a second tubular fabric layer having a pattern of yarns different from said pattern in said first layer interlaced to form an exterior surface and having filaments of yarns raised in loops above said exterior surface to form a raised or velour texture, wherein said loops extend from about 1 mm to about 5 mm in length from said exterior surface and further wherein at least one yarn from said first fabric layer is interlaced with yarns of said second fabric layer to secure said second fabric layer to first fabric layer and further wherein said yarns include warp and fill yarns woven to form said first and said second fabric layers, provided that said warp and said fill yarns of said first fabric layer are woven in a plain pattern and said warp and said fill yarns of said second fabric layer are woven in a twill or a satin pattern.
A synthetic fabric tubular vascular graft comprising:
- a first tubular fabric layer having a pattern of yarns interlaced to form a smooth inner surface and an opposed outer surface;
- and
- a second tubular fabric layer having a pattern of yarns different from said pattern in said first layer interlaced to form an exterior surface and having filaments of yarns raised in loops above said exterior surface to form a raised or velour texture, wherein said loops extend from about 1 mm to about 5 mm in length from said exterior surface and further wherein at least one yarn from said first fabric layer is interlaced with yarns of said second fabric layer to secure said second fabric layer to first fabric layer and further wherein said yarns include pile yarns, trellis yarns and velour yarns, and further wherein said pile yarns and said trellis yarns are knitted to form said first fabric layer and said velour yarns and said trellis yarns are knitted to form said second fabric layer, provided that said pile yarns and said trellis yarns of said first fabric layer are knitted in a tricot or locknit pattern, and provided that said velour yarns and said trellis yarns of said second fabric layer are knitted in a sharkskin pattern.
Dependencies are inferred from the claim text.