Elephant trunk thoracic endograft and delivery system

• US 20040044395A1
• Filed: 09/03/2002
• Published: 03/04/2004
• Est. Priority Date: 09/03/2002
• Status: Active Grant

• Current Assignee: Lifeshield Sciences LLC (Acacia Research Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Nelson, Kristoff
• Granted Patent: US 8,518,096 B2
• Time in Patent Office: Days
• US Class Current: 623/1.12
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/9583 Means for holding the stent on the balloon, e.g. using protrusions, adhesives or an outer sleeve
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable

Abstract

A delivery system for delivering a device within a body lumen. The delivery system includes a self-expanding stent/graft composite prosthesis and a deployment device. The deployment device includes an outer sheath which overlies the graft, and a stent retaining means for maintaining the one end of the stent in a radially compressed state. The outer sheath is retractable with respect to the graft, and the stent retaining means is removable to allow the stent end to radially expand. The deployment device may further include an inner sheath to overlie the composite and is retractable with respect to the composite. An endoluminal prosthesis including a graft attached to one stent and a second stent unattached within the graft lumen.

Claims

1. A prosthesis delivery system comprising:

a stent/graft composite prosthesis comprising a radially expandable stent and an elongated graft secured to said stent; and

a deployment device comprising;

an elongated outer sheath for overlying said prosthesis, said outer sheath being retractable with respect to said prosthesis for allowing radial expansion of said prosthesis; and

a stent retaining member for maintaining an end of said prosthesis in a radially compressed state, said retaining member being separately removable from said end for allowing said radial expansion of said end of said prosthesis.

2. The delivery system according to claim 1, wherein said end of said prosthesis is defined by a portion of prosthesis extending outwardly of said outer sheath.

3. The delivery system according to claim 1, wherein said end of said prosthesis is defined by a portion of said stent extending outwardly of said graft.

4. The delivery system according to claim 1, wherein said outer sheath is a thin wall tube formed of polymeric material.

5. The delivery system according to claim 4, wherein said tube is an extruded.

6. The delivery system according to claim 4, wherein said tube is a composite tube.

7. The delivery system according to claim 4, wherein said tube is sheet formed into a tube.

8. The delivery system according to claim 4, wherein said tube is made from polymeric material which is selected from the group consisting of nylon, polyurethane, polytetrafluoroethylene (PTFE), expanded polytetrafluoroethylene (ePTFE), fluorinated ethylene propylene, polyimide, polyether ether ketone, and polybutylene terephthalate or any combination thereof.

9. The delivery system according to claim 1, wherein said stent retaining member is bio-absorbable.

10. The delivery system according to claim 1, wherein said deployment device comprises a pusher inside said outer sheath to push said stent and prevent said composite from retracting with said outer sheath.

11. The delivery system according to claim 1, wherein the stent is self-expandable.

12. The delivery system according to claim 1, wherein the stent is balloon expandable.

13. A prosthesis delivery system comprising:

a stent/graft composite prosthesis comprising a radially expandable stent and an elongated graft secured to said stent; and

a deployment device comprising;

an elongated outer sheath for overlying graft, said outer sheath being retractable with respect to said graft;

an elongated inner sheath for overlying said stent, said inner sheath being retractable with respect to said stent; and

stent retaining member for maintaining an end of said prosthesis in a radially compressed state, said retaining member being separately removable from said end for allowing said radial expansion of said end of said prosthesis.

14. The delivery system according to claim 13, wherein said end of said prosthesis is defined by a portion of prosthesis extending outwardly of said inner sheath.

15. The delivery system according to claim 13, wherein said end of said prosthesis is defined by a portion of said stent extending outwardly of said graft.

16. The delivery system according to claim 13, wherein said outer sheath is a thin wall tube formed of polymeric material.

17. The delivery system according to claim 16, wherein said tube is an extruded tube.

18. The delivery system according to claim 17, wherein said tube is sheet formed into a tube.

19. The delivery system according to claim 16, wherein said tube is made from polymeric material which is selected from the group consisting of nylon, polyurethane, polytetrafluoroethylene (PTFE), expanded polytetrafluoroethylene (ePTFE), fluorinated ethylene propylene, polyimide, polyether ether ketone, and polybutylene terephthalate or any combinations thereof.

20. The delivery system according to claim 13, wherein said stent retaining is bio-absorbable.

21. The delivery system according to claim 13, wherein said deployment device comprises a pusher inside said outer sheath to push said stent and prevent said composite from retracting with said outer sheath.

22. The delivery system according to claim 13, wherein the stent is self-expandable.

23. The delivery system according to claim 13, wherein the stent is balloon expandable.

24. A prosthesis delivery system comprising:

a stent/graft composite prosthesis comprising a radially expandable stent and an elongated graft secured to said stent; and

a deployment device comprising;

an elongated outer sheath for overlying said stent, said outer sheath being retractable with respect to said stent;

an elongated inner sheath for overlying said graft, the inner sheath being retractable with respect to said graft; and

stent retaining member for maintaining an end of said prosthesis in a radially compressed state, said retaining member being separately removable from said end for allowing said radial expansion of said end of said prosthesis.

25. The delivery system according to claim 24, wherein said end of said prosthesis is defined by a portion of said prosthesis extending outwardly of said inner sheath.

26. The delivery system according to claim 24, wherein said end of said prosthesis is defined by a portion of said stent extending outwardly of said graft.

27. The delivery system according to claim 24, wherein the stent is self-expandable.

28. The delivery system according to claim 24, wherein the stent is balloon expandable.

29. A prosthesis delivery system comprising:

a stent/graft composite prosthesis comprising a first radially expandable stent, an elongated graft secured to said first stent, and a second radially expandable stent;

a deployment device comprising;

an elongated outer sheath for overlying said graft, said outer sheath being retractable with respect to said graft;

an elongated inner sheath for overlying said second stent, said inner stent being retractable with respect to said second stent; and

stent retaining member for maintaining an end of said prosthesis in a radially compressed state, said retaining member being separately removable from said end for allowing said radial expansion of said end of said prosthesis.

30. A delivery system according to claim 29, wherein said end of said prosthesis is defined by a portion of said prosthesis extending outwardly of said inner sheath.

31. The delivery system according to claim 29, wherein said end of said prosthesis is defined by a portion of said first stent extending outwardly of said graft.

32. The delivery system according to claim 29, wherein the stent is self-expandable.

33. The delivery system according to claim 29, wherein the stent is balloon expandable.

34. An endoluminal prosthesis, comprising:

an elongate expandable first stent having a pair of spaced apart ends and an open tubular wall structure therebetween;

an elongate compressible generally tubular graft having opposed ends and a graft wall therebetween, said graft wall having an internal surface defining a graft lumen, one end of said graft being secured to said first stent, other end of graft remains unattached; and

an elongate second stent having a pair of spaced apart ends and an open tubular wall structure therebetween, said second stent being unattached to said graft, said second stent extending through said graft lumen.

35. A prosthesis according to claim 34, wherein said second stent is self-expanding.

36. A prosthesis according to claim 34, wherein said second stent is balloon expandable.

37. A prosthesis according to claim 34, wherein the graft and the second stent are substantially longitudinally coextensive.

38. A prosthesis according to claim 34, wherein the other end of said graft extends beyond said second stent.

39. A prosthesis according to claim 34, wherein one end of said second stent extends beyond said other end of said graft.

40. A prosthesis according to claim 34, wherein said graft is made from polymeric material which is selected from the group consisting of polyester, polypropylene, polyethylene, polytetrafluoroethylene, expanded polytetrafluoroethylene, polyurethane and combinations thereof.

41. The prosthesis according to claim 34, wherein said first stent is made from metallic material which is selected from the group consisting of stainless steel, platinum, gold, titanium and combinations thereof.

42. The prosthesis according to claim 34, wherein said first stent is made from polymeric materials.

43. The prosthesis according to claim 34, wherein said first stent is nitinol.

44. The prosthesis according to claim 34, wherein said second stent is made from metallic material which is selected from the group consisting of stainless steel, platinum, gold, titanium and combinations thereof.

45. The prosthesis according to claim 34, wherein said second stent is made from polymeric materials.

46. The prosthesis according to claim 34, wherein said second stent is nitinol.

47. The delivery system according to claim 34, wherein the stent is self-expandable.

48. The delivery system according to claim 34, wherein the stent is balloon expandable.