APPARATUS FOR SECURING STENT BARBS

• US 20090082841A1
• 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: Marthaler, Maurice, Zacharias, Isaac J.
• Application Number:
  US11/861,739
• Publication Number:
  US 20090082841A1
• Time in Patent Office: Days
• US Class Current: 623/1.110
• 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 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• 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

Abstract

A stent system 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 retaining mechanism is positioned to engage the at least one barb when the stent body is in a compressed state and retain the at least one barb in a tucked position relative to the stent body.

Claims

1. A stent system 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 retaining mechanism positioned to engage the at least one barb when the stent body is in a compressed state and retain the at least one barb in a tucked position relative to the stent body.

2. The stent system according to claim 1 wherein the retaining mechanism includes a bushing body configured to be supported on a stent delivery system.

3. The stent system according to claim 2 wherein the bushing body includes a radial surface with one or more radial outwardly extending pins.

4. The stent system according to claim 3 wherein the pins are arranged in pairs and define a barb receiving space in between each pair of pins.

5. The stent system according to claim 4 wherein the pins are manufactured from a compressible material such that the barb is compressed within the respective barb receiving space.

6. The stent system according to claim 4 wherein each barb receiving space is circumferentially aligned with a strut or tuck pad of the stent body.

7. The stent system according to claim 3 wherein the at least one barb has a thickness and each pin has a radial thickness approximately one-half the barb thickness.

8. The stent system according to claim 2 wherein a stent restraining belt is supported by the bushing body.

9. The stent system according to claim 2 wherein the bushing body includes a secondary through passage.

10. The stent system according to claim 2 wherein the bushing body includes a plurality of surface slots configured to receive a corresponding barb.

11. The stent system according to claim 10 wherein each of the slots extends helically.

12. The stent system according to claim 11 wherein the delivery system supports a secondary retaining mechanism including a plurality of surface slots, and wherein the surface slots of the secondary retaining mechanism extend helically in a direction opposite to the slots of the other retaining mechanism.

13. The stent system according to claim 10 wherein each of the slots is configured to circumferentially align with a strut or tuck pad of the stent body.

14. The stent system according to claim 2 wherein the bushing body is free to rotate relative to the stent delivery system.

15. The stent system according to claim 1 wherein the retaining mechanism is formed integrally with the stent body.

16. The stent system according to claim 15 wherein the retaining mechanism includes a shoulder defined between one of the struts and an associated tuck pad.

17. The stent system according to claim 16 wherein the tuck pad has a radial thickness that is approximately one-half or less of a radial thickness of the associated strut.

18. A stent delivery system comprising:

a stent body;

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

a support positioned at least partially within the stent body, said support including a retaining mechanism positioned to engage the at least one barb when the stent body is in a compressed state and retain the at least one barb in a tucked position relative to the stent body.

19. A stent comprising:

a plurality of struts;

a barb extending from at least one of said struts and configured such that a free end thereof is biased to extend radially outward from the strut; and

a retaining mechanism positioned to engage the barb when the stent is in a compressed state and retain the barb in a tucked position relative to the stent, wherein the retaining mechanism comprises a shoulder defined between two portions of at least one said strut.