SYSTEM AND METHOD OF SECURING STENT BARBS

• US 20090082847A1
• Filed: 09/26/2007
• Published: 03/26/2009
• Est. Priority Date: 09/26/2007
• Status: Abandoned Application

• Current Assignee: Endologix
• Original Assignee: Boston Scientific Corporation
• Inventors: Staudenmayer, Chris L., Marthaler, Maurice, Zacharias, Isaac J., Glynn, Brian A.
• Application Number:
  US11/861,731
• Publication Number:
  US 20090082847A1
• Time in Patent Office: Days
• US Class Current: 623/1.150
• CPC Class Codes: A61F 2/064 with special features to facilitate anastomotic coupling anastomosis of natural blood vessels A61B17/11
• 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 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• 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 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2240/001 Designing or manufacturing processes

Abstract

A stent assembly comprising a stent body. At least one barb extends from the stent body and is configured such that a free end thereof is biased to extend radially outward from the stent body. A belt is releasably positioned about the stent body and aligned with the barb to constrain the barb to a position with the free end proximate to the stent body. A method of forming a stent assembly is also provided.

Claims

1. A stent assembly comprising:

a stent body;

at least one barb extending from the stent body and configured such that a free end thereof is biased to extend radially outward from the stent body; and

a belt releasably positioned about the stent body and aligned with the barb to constrain the barb to a position with the free end proximate to the stent body.

2. The stent according to claim 1 wherein the stent body comprises a plurality of axially extending struts.

3. The stent according to claim 1 wherein the stent body comprises a lattice structure.

4. The stent according to claim 1 wherein the stent body comprises a helical structure.

5. The stent according to claim 1 wherein the at least one barb is formed integrally with the stent body.

6. The stent according to claim 1 wherein the barb free end has a pointed tip.

7. The stent according to claim 6 wherein the pointed tip converges radially outward.

8. The stent according to claim 6 wherein the pointed tip converges radially inward.

9. The stent according to claim 6 wherein a circumferential groove configured to receive the belt extends across the pointed tip.

10. The stent according to claim 9 wherein the circumferential groove does not extend across the stent body.

11. The stent according to claim 1 wherein a circumferential groove extends about the stent body and is configured to receive the belt.

12. The stent according to claim 11 wherein the circumferential groove extends across a portion of the at least one barb.

13. The stent according to claim 1 wherein a release wire releasably secures the belt.

14. The stent according to claim 1 wherein at least one secondary belt radially constrains the stent body.

15. The stent according to claim 14 wherein a single release wire releasably secures the belt and the at least one secondary belt.

16. The stent according to claim 14 wherein a first release wire releasably secures the belt and a second release wire releasably secures the at least one secondary belt.

17. A method of forming a stent assembly, comprising:

forming a stent body having at least one barb with a free end extending radially outward from the stent body; and

releasably securing a belt about the stent body in alignment with the barb to constrain the barb to a position with the free end proximate to the stent body.

18. The method according to claim 17 further comprising:

defining a circumferential groove about the stent body configured to receive the belt.

19. The method according to claim 18 wherein the step of defining the circumferential groove includes deflecting the at least one barb radially inward such that the at least one barb does not include the circumferential groove.

20. The method according to claim 17 further comprising:

defining a circumferential groove across the at least one barb configured to receive the belt.

21. The method according to claim 20 wherein the step of defining the circumferential groove includes deflecting the stent body radially inward such that the stent does not include the circumferential groove.