Implantable textile prostheses having PTFE cold drawn yarns
View Patent ↗The present invention provides an implantable prosthesis and more specifically, an implantable tubular textile prosthesis comprising a biocompatible fabric having inner and outer surfaces and first and second ends; the fabric having a textile construction comprising cold drawn PTFE yarns having a substantially uniform denier and high molecular orientation. Use of cold drawn PTFE yarns result in implantable prostheses that have excellent abrasion resistance, strength and lubricity properties. Useful textile constructions include weaves, knits, braids, filament windings, spun windings and combinations thereof. The prostheses of the present invention are lubricious and have characteristics that closely resemble the properties of a natural body lumen.
1. An implantable textile prosthesis comprising:
a hollow tubular textile construction of a biocompatible yarn, wherein said yarn comprises a cold drawn PTFE yarn having a substantially uniform denier with a standard deviation of less than about 0.8% and a tenacity from 0.36 to 0.45 grams/denier and high molecular orientation fabric.
2. The prosthesis of claim 1 , wherein said textile construction is selected from the group consisting of weaves, knits, braids, filament windings, spun windings and combinations thereof.
3. The prosthesis of claim 1 , wherein said prosthesis is a tubular vascular or endovascular graft.
4. The prosthesis of claim 1 , wherein said prosthesis further includes a coating.
5. The prosthesis of claim 1 , wherein said prosthesis includes a radially deformable support component.
6. The prosthesis of claim 5 , wherein said support component is a radially deformable stent.
7. The prosthesis of claim 1 , wherein said yarn has a linear density of at least about 40 denier; and further wherein said yarn has a linear density of no more than about 400 denier.
8. The prosthesis of claim 1 , wherein said yarn is twisted with at least about 1 twist per inch; and further wherein said yarn is twisted with no more than about 10 twists per inch.
9. The prosthesis of claim 1 , wherein said yarn includes an anti-static lubricant.
10. The prosthesis of claim 1 , wherein said yarn is a room temperature, cold drawn yarn.
11. The prosthesis of claim 1 , wherein said prosthesis is impregnated with a leak resistant material.
12. The prosthesis of claim 1 , wherein said prosthesis includes an axial yarn to control longitudinal extension thereof.
13. The prosthesis of claim 1 , wherein said cold drawn PTFE yarn has a substantially uniform denier with a standard deviation from about 0.2% to about 0.8%.
14. The prosthesis of claim 1 , wherein said cold drawn PTFE yarn has a substantially uniform denier with a standard deviation from about 0.5 to about 10 denier.
15. The prosthesis of claim 1 , wherein said cold drawn PTFE yarn was cold drawn at a draw ratio of about 1.05 to about 1.50 and at room temperature.
16. The prosthesis of claim 1 , wherein said cold drawn PTFE yarn is selected from the group consisting of a flat yarn, a twisted yarn, a textured yarn, a pre-shrunk yarn and combinations thereof.
17. The prosthesis of claim 1 , wherein said cold drawn PTFE yarn is selected from he group consisting of a multifilament yarn, a monofilament yarn, a spun type yarn and combinations thereof.
18. An implantable textile prosthesis comprising:
a hollow tubular textile construction of a biocompatible yarn, wherein said yarn comprises a PTFE yarn having a linear density from about 40 denier to about 400 denier and a tenacity from 0.36 to 0.45 grams/denier.
19. An implantable textile prosthesis comprising:
a hollow tubular textile construction of a biocompatible yarn, wherein said yarn comprises a cold drawn PTFE yarn comprising a weave pattern selected from the group consisting of simple weaves, plain weaves, basket weaves, twill weaves and velour weaves and having a substantially uniform denier with a standard deviation of less than about 0.8% and a tenacity from 0.36 to 0.45 grams/denier and high molecular orientation fabric.
20. The implantable textile prosthesis of claim 19 wherein said weave pattern comprises a longitudinal length and a circumference, said weave pattern includes warp yarns running along the longitudinal length of the weave pattern and fill yarns running around the circumference of the weave pattern, the fill yarns being approximately 90 degrees to one another.