Lead extraction system for transvenous defibrillation leads and for endocardial pacing leads

• US 5,620,451 A
• Filed: 04/25/1995
• Issued: 04/15/1997
• Est. Priority Date: 04/25/1995
• Status: Expired due to Fees

• Current Assignee: Intermedics Incorporated (Boston Scientific Corporation)
• Original Assignee: Intermedics Incorporated (Boston Scientific Corporation)
• Inventors: Rosborough, John P.
• Primary Examiner(s): Kamm, William E.
• Assistant Examiner(s): SCHAETZLE, KENNEDY
• Application Number:
  US08/428,450
• Time in Patent Office: 721 Days
• Field of Search: 606/106, 606/108, 128/657, 128/642, 607/126, 607/127, 607/128, 607/115, 607/116
• US Class Current: 606/108
• CPC Class Codes: A61N 1/057 Anchoring means; Means for fixing the head inside the heart
• CPC Class Codes: A61N 2001/0578 having means for removal or extraction

Abstract

A system for lead removal of both heart pacemaker leads and cardioverter-defibrillator endocardial leads comprising a flexible coil of flattened ribbon. Preferably, the ribbon is comprised of polyethylene or another suitable biologically compatible material. At a distal end of the coil, a cutting surface may be provided, such as a chisel-like edge at the distal end of the coil. A handle may be provided for twisting the coil onto the lead. The coil should be at least partially radiopaque or provided with a surface which is radiopaque so that its use may be observed in the body by fluoroscopy or other suitable means.

Claims

1. A lead extraction system comprising

a coiled, flexible ribbon having a distal end and a proximal end, said flexible ribbon forming a tube adapted to fit over an implanted lead, successive turns of said ribbon lying adjacent one another and spaced apart from one another such that said lead can be passed between two successive turns of said ribbon from an outside of said tube to an inside thereof, and means attached to said distal end of said ribbon for severing fibrous ingrowth surrounding said lead.

2. The lead extraction system according to claim 1 further comprising a handle at said proximal end.

3. The lead extraction system according to claim 2 further comprising means for selectively attaching said handle at said proximal end.

4. The lead extraction system according to claim 3 wherein said means for severing comprise a chisel edge at a distal end of said ribbon.

5. The lead extraction system according to claim 4 wherein said chisel edge has a relatively long bevel on an outward side of said ribbon and a relatively short bevel on an inward side of said ribbon.

6. The lead extraction system according to claim 5 wherein said ribbon is comprised of a bio-compatible polymer.

7. The lead extraction system according to claim 6 wherein at least a part of said ribbon is radiopaque.

8. The lead extraction system according to claim 5 wherein said ribbon is comprised of a bio-compatible metal.

9. The lead extraction system according to claim 8 wherein at least a part of said ribbon is radiopaque.

10. The lead extraction system according to claim 1 wherein said means for severing comprise an abrasive edge at a distal end of said ribbon.

11. The lead extraction system according to claim 10 wherein said abrasive edge comprises a distal edge having a plurality of circumferentially spaced teeth.

12. The lead extraction system according to claim 11 wherein said ribbon is comprised of a bio-compatible polymer.

13. The lead extraction system according to claim 12 wherein at least a part of said ribbon is radiopaque.

14. The lead extraction system according to claim 11 wherein said ribbon is comprised of a bio-compatible metal.

15. The lead extraction system according to claim 14 wherein at least a part of said ribbon is radiopaque.

16. The lead extraction system according to claim 1 wherein said means for severing comprise a chisel edge at a distal end of said ribbon.

17. The lead extraction system according to claim 16 wherein said chisel edge has a relatively long bevel on an outward side of said ribbon and a relatively short bevel on an inward side of said ribbon.

18. The lead extraction system according to claim 17 wherein said ribbon is comprised of a bio-compatible polymer.

19. The lead extraction system according to claim 18 wherein at least a part of said ribbon is radiopaque.

20. The lead extraction system according to claim 16 wherein said ribbon is comprised of a bio-compatible metal.

21. The lead extraction system according to claim 20 wherein at least a part of said ribbon is radiopaque.

22. The lead extraction system according to claim 1 further comprising a blunt end at said proximal end.

23. The lead extraction system according to claim 22 further comprising a handle adapted to be selectively attached at either said proximal or said distal end, whereby either said means for severing or said blunt end can be selectively advanced into the body of a patient.

24. The lead extraction system according to claim 1 wherein said ribbon is comprised of a bio-compatible polymer.

25. The lead extraction system according to claim 24 wherein at least a part of said ribbon is radiopaque.

26. The lead extraction system according to claim 1 wherein said ribbon is comprised of a bio-compatible metal.

27. The lead extraction system according to claim 26 wherein at least a part of said ribbon is radiopaque.