BARBED RADIALLY EXPANDABLE STENT

• US 20120029625A1
• Filed: 09/26/2011
• Published: 02/02/2012
• Est. Priority Date: 12/20/2001
• Status: Active Grant

• Current Assignee: Endologix
• Original Assignee: Trivascular Incorporated
• Inventors: Chobotov, Michael V., Whirley, Robert G.
• Granted Patent: US 8,167,927 B2
• Time in Patent Office: Days
• US Class Current: 623/1.36
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/844 folded prior to deployment
• 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 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2/954 for placing stents or stent-grafts in a bifurcation
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• 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: A61F 2002/825 having longitudinal struts
• CPC Class Codes: A61F 2002/8486 provided on at least one of the ends
• CPC Class Codes: A61F 2002/91508 the meander having a difference in amplitude along the band
• CPC Class Codes: A61F 2002/91516 the meander having a change in frequency along the band
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2002/91583 by a bridge, whereby at least one of its ends is connected along the length of a strut between two consecutive apices within a band
• CPC Class Codes: A61F 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0058 : soldered or brazed or welded
• CPC Class Codes: A61F 2250/0003 : having an inflatable pocket filled with fluid, e.g. liquid or gas
• CPC Class Codes: A61F 2250/0036 : differing in thickness
• CPC Class Codes: A61M 2025/0177 : having external means for receiving guide wires, wires or stiffening members, e.g. loops, clamps or lateral tubes

Abstract

The present application is directed to a stent, and more particularly to a radially self-expandable metallic stent, including a serpentine configuration having a plurality of struts and having a plurality of proximal and distal apices; and a barb integrally formed as an extension of each strut and extending outwardly from a position on each strut; where the barb has an elevation angle with respect to a longitudinal axis of a strut from which the barb extends of about 10 degrees to about 45 degrees.

Claims

1. A radially self-expandable metallic stent, comprising:

a serpentine configuration having a plurality of struts and having a plurality of proximal and distal apices; and

a barb integrally formed as an extension of each strut and extending outwardly from a position on each strut;

wherein the barb has an elevation angle with respect to a longitudinal axis of a strut from which the barb extends of about 10 degrees to about 45 degrees.

2. The stent of claim 1, wherein the plurality of proximal apices is up to six apices.

3. The stent of claim 1, wherein the plurality of distal apices is up to six apices.

4. The stent of claim 1, wherein the barb has a kick angle with respect to a longitudinal axis of a strut from which the barb extends of about 5 degrees to about 70 degrees.

5. The stent of claim 1, wherein a length of the barb ranges from about 1 mm to about 5 mm.

6. The stent of claim 1, wherein the stent is formed from a single piece of material.

7. The stent of claim 6, wherein the stent comprises a superelastic alloy.

8. The stent of claim 7, wherein the superelastic alloy comprises NiTi.

9. The stent of claim 1, wherein the barb terminates in a sharp point.

10. The stent of claim 1, wherein the proximal and distal apices are curved apices.

11. The stent of claim 1, wherein the proximal apices are curved apices having an outer surface with a circular radius of curvature of between about 0.030 inch to about 0.070 inch.

12. The stent of claim 11, wherein the proximal apices have an inner surface with a circular radius of curvature of between about 0.005 inch to about 0.020 inch.

13. The stent of claim 1, wherein the stent is affixed to a graft.

14. The stent of claim 13, wherein the graft comprises polyester.

15. The stent of claim 14, further comprising a delivery system.

16. The stent of claim 1, wherein at least one of the plurality of struts has a width from about 0.016 inch to about 0.032 inch.

17. A radially self-expandable stent, comprising:

a serpentine configuration having a plurality of struts and having a plurality of proximal and distal apices; and

a barb on each strut, the barb being an extension of the strut in which no joint or other connection to the strut exists;

the barb extending outwardly from a position on each strut located proximal to an apex.

18. The stent of claim 17, wherein the stent is affixed to a graft.

19. The stent of claim 18, wherein the graft comprises polyester.

20. The stent of claim 19, further comprising a delivery system.

21. A radially self-expanding stent having integrally formed barbs comprising:

a plurality of struts connected by curved apices and having a barb on each strut, each strut and barb comprising a barb/strut interface in which there is no mechanical connection to join the barb to the strut;

wherein the barb on each strut extends outwardly from the strut; and

wherein the apices have an outer surface with an outer radius of curvature from about 0.030 inch to about 0.070 inch and an inner surface with an inner radius of curvature of about 0.010 inch to about 0.030 inch.

22. The stent of claim 21, further comprising a graft affixed to a portion of the stent.

23. The stent of claim 22, further comprising a delivery system.

24. A radially self-expandable stent, comprising:

a serpentine configuration a plurality of struts and a plurality apices; and

a barb integrally formed as part of each strut such that the barb is an extension of the strut in which no joint of connection exists, each barb extending outwardly on the strut and having an elevation angle of about 10 degrees to about 45 degrees and a kick angle of about 5 degrees to about 70 degrees, the elevation angle and the kick angle both being measured from a longitudinal axis of the strut from which the barb extends.

25. The stent of claim 24, further comprising a stent affixed to a graft.

26. The stent of claim 25, wherein the graft comprises polyester.

27. The stent of claim 25, further comprising a delivery system.

28. The stent of claim 26, wherein the plurality of proximal apices is up to six apices.

29. The stent of claim 28, wherein the apices are curved apices.

30. The stent of claim 29, wherein the stent is nitinol.