Flexible barb for anchoring a prosthesis

• US 7,081,132 B2
• Filed: 05/08/2003
• Issued: 07/25/2006
• Est. Priority Date: 05/16/2002
• Status: Expired due to Term

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Incorporated (Cook Group Incorporated)
• Inventors: DeBruyne, Michael P., Cook, William A., Osborne, Thomas A., Nickless, Benjamin
• Primary Examiner(s): McDermott, Corrine
• Assistant Examiner(s): MATTHEWS, WILLIAM H
• Application Number:
  US10/431,809
• Publication Number:
  US 20030236570A1
• Time in Patent Office: 1,174 Days
• Field of Search: 623 113- 115, 623/1.36, 623/13.14, 606153-155, 606/75, 606/151
• US Class Current: 623/1.36
• 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 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2002/8483 Barbs

Abstract

A barbed medical prosthesis is disclosed in which the barb includes a basal portion comprising a point of union with the substrate of origin (such as a strut), an anchoring portion adapted to embed into tissue, and a stress-dispersing portion located between the basal and anchoring portions. In one embodiment the stress-dispersing portion comprises a helical coil having a free winding that is unattached to the strut from which the barb extends. In another embodiment, the stress-dispersing portion comprises a series of bends or curves formed in the barb proximate to the point of union with the strut. The barb can be mechanically attached and/or soldered to the prosthesis, or integrally formed therefrom. A second barb portion and stress-dispersing portion, may also extend from the basal portion.

Claims

1. An intraluminal medical device configured for deployment within the body of a patient, comprising:

at least one barb comprising a base, an anchoring portion configured to penetrate tissue adjacent the prosthesis, and a non-linear stress-dispersing region spaced apart from and located between the base and the anchoring portion; and

at least one strut joined to the base such that a point of union between the base and the at least one strut is formed, and

a non-linear stress-dispersing region disposed spaced from and proximate to the point of union;

where the point of union comprises a helical coil and the non-linear stress-dispersing region comprises at least one separate free winding, and where the at least one free winding is configured to flex in response to a stress load placed on the anchoring portion of the barb.

2. The barbed prosthesis of claim 1, where the helical coil comprises windings having a first pitch, and the free winding has a second pitch that is greater than the first pitch.

3. A barbed prosthesis configured for deployment within the body of a patient, comprising:

at least one strut;

at least one barb joined to the at least one strut to form a point of union between the barb and the strut;

wherein the barb comprises an anchoring portion spaced apart from the point of union and configured to penetrate tissue adjacent the prosthesis; and

a non-linear stress-dispersing region disposed between and spaced apart from the point of union and the anchoring portion, where the non-linear stress-dispersing region is more proximate the point of union than the anchoring portion.

4. The prosthesis of claim 3, where the barb is joined to the at least one strut by mechanical attachment means, by bonding means, or a combination of mechanical attachment and bonding means.

5. The prosthesis of claim 3, where the non-linear stress-dispersing region comprises at least one bend spaced apart from the point of union.

6. The prosthesis of claim 3, where the non-linear stress-dispersing region comprises a series of bends spaced apart from the point of union.

7. The prosthesis of claim 3, where the non-linear stress-dispersing region extends away from the at least one strut.

8. The prosthesis of claim 3, where the point of union comprises a helical coil formed about the strut wherein the coil comprises a series of windings having a first pitch.

9. The prosthesis of claim 8, where the stress-dispersing region comprises at least one separate free winding extending distally and spaced apart from the windings of the point of union, where the free winding has a second pitch that is greater than the first pitch.

10. The prosthesis of claim 9, where the free winding comprises a partial winding.

11. The prosthesis of claim 3, where the non-linear stress-dispersing region is configured to flex in response to a stress load placed on the anchoring portion of the barb.

12. An intraluminal medical device configured for deployment within the body of a patient, comprising:

at least one stent having a one or more struts;

at least one barb joined to at least one strut to form a point of union between the barb and the strut;

wherein the barb comprises an anchoring portion spaced apart from the point of union and configured to penetrate tissue adjacent the stent; and

a non-linear stress-dispersing region disposed between and spaced apart from the point of union and the anchoring portion, where the non-linear stress-dispersing region is more proximate the point of union than the anchoring portion.

13. The prosthesis of claim 12, where the barb is joined to the strut by mechanical attachment means, by bonding means, or a combination of mechanical attachment and bonding means.

14. The prosthesis of claim 12, where the non-linear stress-dispersing region comprises at least one bend spaced apart from the point of union.

15. The prosthesis of claim 12, where the non-linear stress-dispersing region comprises a series of bends spaced apart from the point of union.

16. The prosthesis of claim 12, where the non-linear stress-dispersing region extends away from the strut.

17. The prosthesis of claim 12, where the point of union comprises a helical coil formed about the strut wherein the coil comprises a series of windings having a first pitch.

18. The prosthesis of claim 17, where the stress-dispersing region comprises at least one separate free winding extending distally and spaced apart from the windings of the point of union, where the free winding has a second pitch that is greater than the first pitch.

19. The prosthesis of claim 18, where the free winding comprises a partial winding.

20. The prosthesis of claim 12, where the non-linear stress-dispersing region is configured to flex in response to a stress load placed on the anchoring portion of the barb.