Anchor pin stent-graft delivery system

• US 8,454,682 B2
• Filed: 04/13/2010
• Issued: 06/04/2013
• Est. Priority Date: 04/13/2010
• Status: Active Grant

• Current Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Original Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Inventors: Argentine, Jeffery
• Primary Examiner(s): Sweet, Thomas J
• Assistant Examiner(s): MILLER, CHERYL L
• Application Number:
  US12/759,433
• Publication Number:
  US 20110251667A1
• Time in Patent Office: 1,148 Days
• Field of Search: 623/1.14, 623/1.36, 623/1.15
• US Class Current: 623/1.36
• 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 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable

Abstract

A stent-graft delivery system includes a stent-graft including a proximal anchor stent ring. The proximal anchor stent ring includes proximal apexes and anchor pin structures extending proximally from each of the proximal apexes. The anchor pin structures include anchor pin connecting arms and anchor pins. The anchor pin structures are tucked together to accommodate small catheter sizes. Further, the anchor pins reduce or eliminate migration of the stent-graft. Further still, the anchor pin connecting arms are long and flexible thus distributing stresses in a way that improves the load carrying capacity of the anchor pins and allows flowering of the graft material of the stent-graft prior to release of the anchor pins structures.

Claims

1. A stent-graft delivery system comprising:

a stent-graft comprising a proximal anchor stent ring comprising;

proximal apexes;

anchor pin structures extending proximally from each of said proximal apexes, said anchor pin structures comprising anchor pin connecting arms and anchor pins, said anchor pin connecting arms comprising;

anchor pin connecting long arms;

anchor pin connecting short arms, said anchor pin connecting long arms being longer than said anchor pin connecting short arms;

distal apexes; and

struts alternating between said proximal apexes and said distal apexes, wherein said struts comprise;

offset struts; and

aligned struts;

wherein every other of said distal apexes is connected to a pair of said aligned struts, wherein the distal apexes between said every other of said distal apexes is connected to a pair of said offset struts.

2. The stent-graft delivery system of claim 1 wherein said stent-graft further comprises:

graft material attached to said distal apexes.

3. The stent-graft delivery system of claim 1 4 wherein said offset struts are circumferentially offset from said anchor pin connecting arms.

4. The stent-graft delivery system of claim 1 4 wherein said aligned struts are circumferentially aligned with said anchor pin connecting arms.

5. The stent-graft delivery system of claim 1 4 wherein said anchor pin connecting arms are proximal extensions of said aligned struts.

6. The stent-graft delivery system of claim 1 4 wherein said proximal anchor stent ring comprises a repeating pattern of said offset struts and said aligned struts.

7. The stent-graft delivery system of claim 1 4 wherein said distal apexes are connected to either a pair of said offset struts or a pair of said aligned struts.

8. The stent-graft delivery system of claim 1 wherein said anchor pin connecting long arms and said anchor pin connecting short arms longitudinally offset said anchor pins.

9. The stent-graft delivery system of claim 8 wherein said proximal anchor stent ring comprises an alternating pattern of said anchor pin connecting long arms and said anchor pin connecting short arms.

10. The stent-graft delivery system of claim 9 wherein said anchor pin connecting short arms are between said anchor pin connecting long arms.

11. The stent-graft delivery system of claim 8 wherein each of said anchor pin connecting long arms is directly adjacent an adjacent anchor pin connecting short arm in a first circumferential direction and is spaced apart from a spaced apart anchor pin connecting short arm in an opposite second circumferential direction.

12. The stent-graft delivery system of claim 11 wherein a distance between an anchor pin connecting long arm and an adjacent anchor pin connecting short arm is equal to a distance between said struts.

13. The stent-graft delivery system of claim 11 wherein a distance between an anchor pin connecting long arm and a spaced apart anchor pin connecting short arm is equal to two times a width of said struts plus three times a distance between said struts.

14. The stent-graft delivery system of claim 1 wherein said proximal anchor stent ring further comprises:

short arm extensions extending proximally from said anchor pin connecting short arms; and

extension anchor pins connected to proximal ends of said short arm extensions.

15. The stent-graft delivery system of claim 1 wherein said anchor pins are connected to proximal ends of said anchor pin connecting arms.

16. The stent-graft delivery system of claim 1 wherein said anchor pins comprise sharp points.

17. A stent-graft comprising:

a proximal anchor stent ring comprising;

proximal apexes;

distal apexes;

anchor pin structures extending proximally from each of said proximal apexes, said anchor pin structures comprising anchor pin connecting arms and anchor pins;

struts alternating between said proximal apexes and said distal apexes, said struts comprising;

offset struts circumferentially offset from said anchor pin connecting arms;

aligned struts circumferentially aligned with said anchor pin connecting arms, wherein said anchor pin connecting arms are proximal extensions of said aligned struts;

a graft material attached to said distal apexes

wherein said anchor pin connecting arms comprise;

anchor pin connecting long arms; and

anchor pin connecting short arms, said anchor pin connecting long arms being longer than said anchor pin connecting short arms;

wherein each of said anchor pin connecting long arms is directly adjacent an adjacent anchor pin connecting short arm in a first circumferential direction and is spaced apart from a spaced apart anchor in connecting short arm in an opposite second circumferential direction;

wherein a distance between an anchor pin connecting long arm and a spaced apart anchor pin connecting short arm is equal to two times a width of said struts plus three times a distance between said struts.

18. The stent-graft of claim 17 wherein said distal apexes are connected to either a pair of said offset struts or a pair of said aligned struts.

19. The stent-graft of claim 17 wherein every other of said distal apexes is connected to a pair of said aligned struts, wherein the distal apexes between said every other of said distal apexes is connected to a pair of said offset struts.

20. The stent-graft of claim 17 wherein said anchor pin connecting short arms are between said anchor pin connecting long arms.

21. The stent-graft of claim 17 wherein a distance between an anchor pin connecting long arm and an adjacent anchor pin connecting short arm is equal to a distance between said struts.