Stent Graft Device With Anchoring Members Having Adjustable Geometries

• US 20160346075A1
• Filed: 05/23/2016
• Published: 12/01/2016
• Est. Priority Date: 05/27/2015
• Status: Active Grant

• Current Assignee: WL Gore and Associates Incorporated (W.L. Gore and Associates)
• Original Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Inventors: Michalak, Christopher S.
• Granted Patent: US 10,765,539 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/844 folded prior to deployment
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2002/8483 Barbs
• CPC Class Codes: A61F 2002/8486 provided on at least one of the ends
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2250/0059 temporary

Abstract

A stent graft device that includes a frame, a cover material covering the frame, and an anchoring member having an adjustable geometry is provided. The anchoring member may be incorporated as part of the frame or coupled thereto. The anchoring member may be formed of a material having a tensile strength such that it can be bent, straightened, or otherwise changed in shape. Tissue growth over and/or around the anchoring member anchors the stent graft device within a lumen. During removal of the stent graft device, the geometry of the anchoring member changes to allow the anchoring member to be removed from the tissue growth along a removal path with minimal trauma. The design and/or shape of the anchoring member is not particularly limited so long as the anchoring member has an adjustable geometry that permits tissue overgrowth and subsequent removal from the tissue overgrowth with minimal trauma.

Claims

1. A stent graft device comprising:

an expandable frame;

a covering extending over said expandable frame; and

an anchoring member coupled to said expandable frame and extending along a length of said expandable frame,

wherein said anchoring member moves axially with minimal displacement in tissue growth over said anchoring member for removal of said anchoring member from said expandable frame.

2. The stent graft device of claim 1, wherein said tissue growth on said anchoring member anchors said stent in a lumen.

3. The stent graft device of claim 1, wherein said anchoring member has a serpentine or cork-screw configuration.

4. The stent graft device of claim 3, wherein said wire is coupled to said expandable frame by a plurality of coupling members positioned on an exterior surface of said expandable frame.

5. A stent graft device comprising:

an expandable frame;

a covering extending over said expandable frame; and

an anchoring member coupled to said expandable frame and extending along a length of said expandable frame in an implanted state, said length defining a removal path of said anchoring member,

wherein said anchoring member is adapted for removal from said expandable frame along said removal path of said anchoring member.

6. The stent graft device of claim 5, wherein tissue overgrowth on said anchoring member anchors said stent in a lumen.

7. The stent graft device of claim 6 wherein removal of said anchoring ember is atraumatic.

8. The stent graft device of claim 5, wherein said anchoring member has a serpentine or cork-screw configuration.

9. The stent graft device of claim 8, wherein said anchoring member is coupled to said expandable frame by a plurality of coupling members positioned on an exterior surface of said expandable frame.

10. A stent graft device comprising:

an expandable support frame having incorporated therein an anchoring member to anchor said stent graft device in a lumen; and

a covering extending over said expandable support frame,

wherein a geometry of said anchoring member changes for removal of said anchoring member from tissue growth over said anchoring member.

11. The stent graft device of claim 10, wherein said anchoring member is a coiled wire extending outwardly from said expandable support frame in an implanted state, and

wherein said anchoring member assumes an uncoiled configuration for removal of said stent graft device from said lumen.

12. The stent graft device of claim 10, wherein said anchoring member comprises a first member and an opposing second member such that said first member and said second member are engaged with each other in an implanted state, and

wherein said first member and said second member disengage for removal of said stent graft device from said lumen.

13. The stent graft device of claim 10, wherein said tissue growth anchors said stent in a lumen.

14. A method of removing a stent graft device from a lumen, said method comprising:

providing a stent graft device having an anchoring member coupled thereto, said anchoring member extending along a length of said expandable frame, wherein said length defines a removal path of said anchoring member; and

applying a mechanical force to said anchoring member to remove said anchoring member from said stent graft device along said removal path.

15. The method of claim 14, further comprising removing said stent graft device from said lumen.

16. The method of claim 14, wherein said stent graft device comprises:

an expandable frame; and

a covering extending over said expandable frame,

wherein said anchoring member is coupled to said expandable frame.

17. A method of removing a stent graft device from a lumen, said method comprising:

providing a stent graft device having incorporated therein an anchoring member extending outwardly from said stent graft device,

applying a mechanical force to change a geometry of said anchoring member to remove said anchoring member from along a removal path defined by said anchoring member.

18. The method of claim 17, further comprising removing said stent graft device from said lumen.

19. The method of claim 17, wherein said stent graft device comprises:

an expandable support frame having incorporated therein said anchoring member; and

a covering extending over said expandable support frame.

20. The method of claim 17, wherein said anchoring member is a coiled wire and said changing said geometry comprises uncoiling said anchoring member.

21. The method of claim 17, wherein said anchoring member comprises a first member and an opposing second member such that said first member and said second member are engaged with each other, and said changing said geometry comprises disengaging said first member and said second member.