Textured woven fabric for use in implantable bioprostheses

Patent metadata

Field	Value
Publication number	US-11008676-B2
Application number	US-201615378375-A
Country	US
Kind code	B2
Filing date	Dec 14, 2016
Priority date	Dec 16, 2015
Publication date	May 18, 2021
Grant date	May 18, 2021

Abstract

A textured fabric for an implantable bioprosthesis is provided. The textured fabric can include a woven base layer and a plurality of loops projecting from the woven base layer. The plurality of loops are formed from a composite core-sheath yarn. The core can be made of a material that is different from the sheath. The core material can be selected to impart strength and resiliency to bending and the sheath material can be selected to impart a larger surface area or texture that facilitates cellular or tissue in-growth.

First claim

The invention claimed is:

1. A textured fabric for a bioprosthesis comprising:
a base layer; and
a plurality of loops projecting from the base layer;
wherein the plurality of loops is formed from a composite core-sheath yarn; and
wherein the base layer is a woven base layer comprising warp and weft yarns and wherein the base layer comprises yarns having a diameter of about 20 microns to about 70 microns;
wherein the composite core-sheath yarn comprises a core that is made from a monofilament yarn or a shape memory metal and a sheath that is made from a textured multifilament yarn;
wherein the sheath has a diameter of about 25 microns to about 250 microns; and
wherein the textured fabric has a loop density of about 400 loops/in 2 to about 1,000 loops/in 2 .

2. The textured fabric of claim 1 , wherein the warp and weft yarns are made from a material each independently selected from the group consisting of: polyester, polyethylene, ultra-high molecular-weight polyethylene (“UHMWPE”), polypropylene, polytetrafluoroethylene (“PTFE”), expanded PTFE (“ePTFE”), and nylon.

3. The textured fabric of claim 1 , wherein the warp and weft yarns are made of the same material.

4. The textured fabric of claim 1 , wherein the warp and weft yarns are made of different materials.

5. The textured fabric of claim 1 , wherein the base layer has an EPI of about 150 to about 300.

6. The textured fabric of claim 1 , wherein the base layer has a PPI of about 100 to about 250.

7. The textured fabric of claim 1 , wherein the core is made from the shape memory material and wherein the shape memory material is an alloy of nickel and titanium.

8. The textured fabric of claim 1 , wherein the core is the monofilament yarn and wherein the monofilament yarn is selected from the group consisting of: polyester, polyethylene, UHMWPE, polypropylene, PTFE, ePTFE, and nylon.

9. The textured fabric of claim 1 , wherein the sheath has a denier of from about 15 to about 40.

10. The textured fabric of claim 1 , wherein the sheath has a filament count of from about 5 to about 20.

11. The textured fabric of claim 1 , wherein the sheath is wrapped around a core, the sheath being provided externally of the core.

12. A bioprosthetic heart valve comprising the textured fabric of claim 1 .

13. A textured fabric for a bioprosthesis comprising:
a base layer; and
a plurality of loops projecting from the base layer,
wherein the plurality of loops is formed from a composite core-sheath yarn; and
wherein the textured fabric has a loop density of about 400 loops/in 2 to about 1,000 loops/in 2 .

14. The textured fabric of claim 13 , wherein the base layer is a woven base layer comprising warp and weft yarns.

15. The textured fabric of claim 14 , wherein the warp and weft yarns are made from a material each independently selected from the group consisting of: polyester, polyethylene, ultra-high molecular-weight polyethylene (“UHMWPE”), polypropylene, polytetrafluoroethylene (“PTFE”), expanded PTFE (“ePTFE”), and nylon.

16. The textured fabric of claim 14 , wherein the warp and weft yarns are made of the same material.

17. The textured fabric of claim 14 , wherein the warp and weft yarns are made of different materials.

18. The textured fabric of claim 14 , wherein the base layer comprises yarns having a diameter of about 20 microns to about 70 microns.

19. The textured fabric of claim 14 , wherein the base layer has an EPI of about 150 to about 300.

20. The textured fabric of claim 14 , wherein the base layer has a PPI of about 100 to about 250.

21. The textured fabric of claim 13 , wherein the composite core-sheath yarn comprises a core that is made from a monofilament yarn or a shape memory metal.

22. The textured fabric of claim 21 , wherein the core is made from the shape memory material and wherein the shape memory material is an alloy of nickel and titanium.

23. The textured fabric of claim 21 , wherein the core is the monofilament yarn and wherein the monofilament yarn is selected from the group consisting of: polyester, polyethylene, UHMWPE, polypropylene, PTFE, ePTFE, and nylon.

24. The textured fabric of claim 21 , wherein the sheath is made of a textured multifilament yarn.

25. The textured fabric of claim 24 , wherein the sheath has a denier of from about 15 to about 40.

26. The textured fabric of claim 24 , wherein the sheath has a filament count of from about 5 to about 20.

27. The textured fabric of claim 24 , wherein the sheath has a diameter of about 25 microns to about 250 microns.

28. The textured fabric of claim 13 , wherein the plurality of loops has a loop height of about 0.0250 inches to about 0.100 inches.

29. The textured fabric of claim 13 , wherein the core-sheath yarn has a TPI of about 20 to about 40.

30. The textured fabric of claim 13 , wherein the sheath is wrapped around a core, the sheath being provided externally of the core.

31. A bioprosthetic heart valve comprising the textured fabric of claim 13 .

32. A textured fabric for a bioprosthesis comprising:
a base layer; and
a plurality of loops projecting from the base layer,
wherein the plurality of loops is formed from a composite core-sheath yarn; and
wherein the composite core-sheath yarn comprises a core and a sheath that is made from a different material from the core; and
wherein the plurality of loops has a loop height of about 0.0250 inches to about 0.100 inches.

33. The textured fabric of claim 32 , wherein the base layer is a woven base layer comprising warp and weft yarns.

34. The textured fabric of claim 33 , wherein the warp and weft yarns are made from a material each independently selected from the group consisting of: polyester, polyethylene, ultra-high molecular-weight polyethylene (“UHMWPE”), polypropylene, polytetrafluoroethylene (“PTFE”), expanded PTFE (“ePTFE”), and nylon.

35. The textured fabric of claim 33 , wherein the warp and weft yarns are made of the same material.

36. The textured fabric of claim 33 , wherein the warp and weft yarns are made of different materials.

37. The textured fabric of claim 33 , wherein the base layer comprises yarns having a diameter of about 20 microns to about 70 microns.

38. The textured fabric of claim 33 , wherein the base layer has an EPI of about 150 to about 300.

39. The textured fabric of claim 33 , wherein the base layer has a PPI of about 100 to about 250.

40. The textured fabric of claim 32 , wherein the composite core-sheath yarn comprises a core that is made from a monofilament yarn or a shape memory metal.

41. The textured fabric of claim 40 , wherein the core is made from the shape memory material and wherein the shape memory material is an alloy of nickel and titanium.

42. The textured fabric of claim 40 , wherein the core is the monofilament yarn and wherein the monofilament yarn is selected from the group consisting of: polyester, polyethylene, UHMWPE, polypropylene, PTFE, ePTFE, and nylon.

43. The textured fabric of claim 40 , wherein the sheath is made of a textured multifilament yarn.

44. The textured fabric of claim

Assignees

• Edwards Lifesciences Corp

Inventors

• Chadha Ajay
• Nguyen Son V
• Rupp Kevin D

Classifications

• A61L27/06

  Titanium or titanium alloys · CPC title

• A61L27/56

  Porous materials, {e.g. foams or sponges} · CPC title

• A61L27/16

  obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• A61F2210/0076

  multilayered, e.g. laminated structures · CPC title

• A61L2430/20

  for reconstruction of the heart, e.g. heart valves · CPC title