Non-porous graft with fastening elements

• US 7,530,994 B2
• Filed: 12/30/2003
• Issued: 05/12/2009
• Est. Priority Date: 12/30/2003
• Status: Expired due to Fees

• Current Assignee: Lifeshield Sciences LLC (Acacia Research Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Thistle, Robert C.
• Primary Examiner(s): McDermott; Corrine
• Assistant Examiner(s): Prone; Christopher D
• Application Number:
  US10/748,610
• Publication Number:
  US 20050149165A1
• Time in Patent Office: 1,960 Days
• Field of Search: None
• US Class Current: 623/1.13
• 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 2002/065 Y-shaped blood vessels
• CPC Class Codes: A61F 2002/072 Encapsulated stents, e.g. wire or whole stent embedded in lining
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: Y10T 29/49838 by stringing
• CPC Class Codes: Y10T 29/49947 by applying separate fastener

Abstract

A graft is provided that is adapted to be secured to a stent surrounding the graft. The graft includes an inner layer of a non-porous material, and an outer layer of material laminated to the inner layer. The graft further includes a plurality of fastening elements adapted to be secured to a stent surrounding the graft. An underside of each fastening element is fixed between the inner layer and the outer layer.

Claims

1. A non-porous stent-graft comprising:

a graft comprising;

an inner layer of a non-porous material;

an outer layer of material laminated to said inner layer; and

a fastening element adapted to be secured to said stent, wherein said fastening element is fixed between said inner layer and said outer layer, and wherein said fastening element comprises a closed loop penetrating through said outer layer in no more than two locations;

a stent disposed around an exterior portion of the graft; and

a locking element coupled to the stent and to the fastening element of the graft, wherein the locking element does not pass through the graft.

2. The stent-graft as recited in claim 1 comprising a plurality of said fastening elements distributed lengthwise and/or circumferentially on said graft.

3. The stent-graft as recited in claim 1, wherein said fastening elements comprise D-shaped rings.

4. The stent-graft as recited in claim 1, wherein the material of said inner layer is expanded polytetrafluoroethylene.

5. The stent-graft as recited in claim 1, wherein the material of said outer layer is polyester.

6. The stent-graft as recited in claim 1, wherein the material of said outer layer is knitted, woven, or braided.

7. The stent-graft as recited in claim 1, wherein the material of said fastening elements is a radiographically differentiable material.

8. A stent-graft comprising:

a stent disposed around an exterior portion of a graft said graft comprising;

an inner layer of a non-porous material; and

an outer layer of knitted, woven, or braided material laminated to said inner layer, wherein said outer layer includes a plurality of fastening elements extending outwardly from said outer layer along a length of said outer layer of said tubular graft, wherein each of the plurality of fastening elements comprises a closed loop penetrating through-said outer layer in no more than two locations, at least some of said fastening elements positioned to extend between elements of the stent when said stent is surrounding said graft; and

;

a locking element coupled to the stent and to the fastening element of the graft, wherein the locking element does not pass through the graft.

9. The stent-graft as recited in claim 8, wherein said fastening elements comprise D-shaped rings.

10. The stent-graft as recited in claim 8, wherein the material of said inner layer is expanded polytetrafluoroethylene.

11. The stent-graft as recited in claim 8, wherein the material of said outer layer is polyester.

12. A stent-graft for defining a fluid passageway in a body lumen, said stent-graft comprising:

a stent; and

a graft, said graft comprising;

an inner layer of a non-porous material;

an outer layer of knitted, woven, or braided material laminated to said inner layer; and

a plurality of fastening elements, wherein at least a part of each fastening element is fixed between said inner layer and said outer layers and wherein each of the plurality of fastening elements comprises a closed loop penetrating through said outer layer in no more than two locations;

said stent surrounding said graft and having a plurality of stent elements, each of said plurality of fastening elements projecting into a space defined between the stent elements and entirely within said space, said fastening elements being secured to said stent.

13. The stent-graft as recited in claim 12, wherein said fastening elements comprise D-shaped rings.

14. A stent-graft for defining a fluid passageway in a body lumen, said stent-graft comprising:

a stent; and

a graft, said graft comprising;

an inner layer of a non-porous material;

an outer layer of knitted, woven, or braided material laminated to said inner layer; and

a plurality of fastening elements, wherein at least a part of each fastening element is fixed between said inner layer and said outer layers and wherein each of the plurality of fastening elements comprises a closed loop penetrating through said outer layer in no more than two locations;

said stent surrounding said graft and secured thereto through said fastening elements , wherein said graft is attached to said stent with said fastening elements projecting through said stent and a plurality of looped locking elements securing said fastening elements to said stent.

15. The stent-graft as recited in claim 14, wherein the material of said looped locking elements is a radiographically differentiable material.

16. A stent-graft for defining a fluid passageway in a body lumen, said stent-graft comprising:

a stent comprising stent elements; and

a graft, said graft comprising;

an inner layer of a non-porous material; and

an outer layer of knitted, woven, or braided material laminated to said inner layer, wherein said outer layer includes a plurality of fastening elements extending outwardly from said outer layer along a length of said outer layer of said graft, at least some of said fastening elements adapted to be secured on an outer surface of the stent surrounding said graft, at least a part of each said fastening element being disposed between said inner layer and said outer layer and extending into a space between said stent elements, wherein each of the plurality of fastening elements comprises a closed loop penetrating through said outer layer in no more than two locations; and

a locking element coupled to the stent and to at least one of the fastening elements of the graft.

17. A stent-graft for defining a fluid passageway in a body lumen, said stent-graft comprising:

a stent; and

a graft, said graft comprising;

an inner layer of a non-porous material; and

an outer layer of knitted, woven, or braided material laminated to said inner layer, wherein said outer layer includes a plurality of fastening elements extending outwardly from said outer layer along a length of said outer layer of said graft, at least some of said fastening elements adapted to be secured on an outer surface of the stent surrounding said graft, at least a part of each said fastening element being disposed between said inner layer and said outer layer, wherein each of the plurality of fastening elements comprises a closed loop penetrating through said outer layer in no more than two locations, wherein said graft is attached to said stent with said fastening elements projecting through said stent and a plurality of looped locking elements secured to said stent by knotted loops of suture material.