STENT HAVING AT LEAST ONE BARB AND METHODS OF MANUFACTURE

• US 20090149946A1
• Filed: 12/01/2008
• Published: 06/11/2009
• Est. Priority Date: 12/05/2007
• Status: Abandoned Application

• Current Assignee: Cook Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Incorporated (Cook Group Incorporated)
• Inventors: Dixon, Christopher G.
• Application Number:
  US12/325,420
• Publication Number:
  US 20090149946A1
• Time in Patent Office: Days
• US Class Current: 623/1.360
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/8483 Barbs
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2250/0039 differing in diameter

Abstract

The present embodiments provide a barbed stent having at least one integrally-formed barb. In one embodiment, the barbed stent comprises a stent having at least one segment forming a strut. A slit is formed in the strut, preferably such that the slit is disposed partially but not entirely through the strut. A barbed portion is formed extending from the strut, whereby the slit separates the barbed portion from a remainder of the strut. The barbed portion then may be bent at an angle with respect to the strut, and a sharpened tip suitable for engaging tissue may be formed, for example, by grinding an end region of the barbed portion.

Claims

1. A barbed stent for use in an endoluminal procedure, comprising:

a stent having at least one segment forming a strut;

a slit formed in the strut; and

a barbed portion extending from the strut, wherein the slit separates the barbed portion from a remainder of the strut.

2. The barbed stent of claim 1, wherein the slit is formed in the strut at an angle of about 5 to about 45 degrees with respect to a longitudinal axis of the strut.

3. The barbed stent of claim 1, wherein the slit comprises a first region that is substantially orthogonal with respect to a longitudinal axis of the strut and further comprises a second region that is substantially parallel to the longitudinal axis of the strut.

4. The barbed stent of claim 1, wherein the slit comprises a first region that is formed at an angle with respect to a longitudinal axis of the strut and further comprises a second region that is substantially parallel to the longitudinal axis of the strut.

5. The barbed stent of claim 1, wherein the barbed portion is formed at an acute angle with respect to the strut by bending the barbed portion with respect to the strut.

6. The barbed stent of claim 1, wherein the barbed portion comprises a sharpened tip.

7. The barbed stent of claim 1 further comprising a reinforcing member disposed at least partially within the slit and further disposed between a portion of the barbed portion and the strut.

8. The barbed stent of claim 7, wherein the reinforcing member comprises solder.

9. The barbed stent of claim 1, wherein the stent comprises a Z-shaped stent.

10. The barbed stent of claim 1, wherein the barbed stent comprises at least two barbed portions, wherein a first barbed portion is formed in a proximally-oriented direction and a second barbed portion is formed in a distally-oriented direction.

11. A barbed stent for use in an endoluminal procedure, comprising:

a stent having at least one segment forming a strut;

a slit formed in the strut, wherein the slit is formed in the strut at an angle of about 5 to about 45 degrees with respect to a longitudinal axis of the strut; and

a barbed portion extending from the strut, wherein the slit separates the barbed portion from a remainder of the strut, and wherein an end region of the barbed portion is bent at an angle with respect to the remainder of the strut.

12. The barbed stent of claim 11, wherein the end region of the barbed portion comprises a sharpened tip configured to engage tissue.

13. The barbed stent of claim 11 further comprising a reinforcing member disposed at least partially within the slit and further disposed between a portion of the barbed portion and the strut.

14. The barbed stent of claim 13, wherein the reinforcing member comprises solder.

15. The barbed stent of claim 11, wherein the stent comprises a Z-shaped stent.

16. The barbed stent of claim 11, wherein the stent comprises a fixation stent having proximal and distal regions, wherein the proximal region is coupled to a distal end of a stent-graft, and wherein the distal region comprises at least one barbed portion configured to engage tissue.

17. A method for forming a barbed stent, comprising:

providing a stent having at least one segment forming a strut;

forming a slit in the strut; and

forming a barbed portion that extends from the strut, wherein the slit separates the barbed portion from a remainder of the strut.

18. The method of claim 17 further comprising forming the barbed portion at an angle with respect to the strut by bending the barbed portion with respect to the strut.

19. The method of claim 17 further comprising sharpening a tip of the barbed portion by grinding at least an end portion of the barbed portion.

20. The method of claim 17 further comprising reinforcing the slit to enhance the attachment between a portion of the barbed portion and the strut.