Atraumatic lead removal sheath

• US 8,326,437 B2
• Filed: 03/04/2009
• Issued: 12/04/2012
• Est. Priority Date: 03/04/2009
• Status: Active Grant

• Current Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Original Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Inventors: Cully, Edward H., Duncan, Jeffrey B., Hopkinson, Aaron J., Vonesh, Michael J.
• Primary Examiner(s): Layno, Carl H
• Assistant Examiner(s): Stice, Paula J
• Application Number:
  US12/397,886
• Publication Number:
  US 20100228262A1
• Time in Patent Office: 1,371 Days
• Field of Search: 607115-130, 623/1.12
• US Class Current: 607/116
• CPC Class Codes: A61N 1/05 for implantation or insertion into the body, e.g. heart electrode A61N1/06 takes precedence
• CPC Class Codes: A61N 1/0587 Epicardial electrode systems; Endocardial electrodes piercing the pericardium
• CPC Class Codes: A61N 2001/0578 having means for removal or extraction
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

An implantable device for the atraumatic removal of chronically implanted medical devices.

Claims

1. A medical device comprising:

an implantable lead having a length, a distal end, a proximal end, an outer surface and a longitudinal axis; and

a tubular cover wherein said tubular cover is positioned over a substantial portion of the outer surface of the implantable lead, the tubular cover comprising at least one axial location including means of permitting circumferential tearing of the tubular cover, the tubular cover being physically coupled to the implantable lead at a location distal to each of the at least one axial location including means for permitting the circumferential tearing of the tubular cover; and

wherein said tubular cover is configured to tear and evert upon application of a longitudinal force effective to cause the implantable lead to move in a proximal direction during removal of said implantable lead from anatomy, wherein upon eversion said tubular cover folds into itself.

2. The device of claim 1, wherein the implantable lead is a therapeutic or diagnostic lead.

3. The device of claim 1, wherein the implantable lead is a transmission lead.

4. The device of claim 3, wherein the implantable transmission lead is for cardiac applications.

5. The device of claim 3, wherein the implantable transmission lead is for neurological applications.

6. The device of claim 1, wherein the tubular cover comprises ePTFE.

7. The device of claim 6, wherein said ePTFE comprises at least one additive.

8. The device of claim 7, wherein said additive is a lubricating agent.

9. The device of claim 7, wherein said additive helps conduct electrical energy across said tubular cover.

10. The device of claim 7, wherein said additive elicits a bioactive response.

11. The device of claim 10, wherein said bioactive response is selected from the group consisting of an anti-inflammatory, an anti-microbial and an anti-proliferative response.

12. The device of claim 6, wherein said tubular cover modulates tissue ingrowth and/or adhesion.

13. The device of claim 1, wherein said tubular cover resists tissue ingrowth and/or adhesion.

14. The device of claim 1, wherein the tubular cover allows for transfer of energy.

15. The device of claim 14, wherein said energy is electrical energy.

16. The device of claim 15, wherein said cover is electrically transmissive upon wetting.

17. The device of claim 15, wherein said tubular cover allows for transfer of gases generated by electrolysis.

18. The device of claim 1, wherein the tubular cover is attached to the implantable lead at least at the distal end of the lead.

19. A method for removing an implantable lead comprising:

applying a longitudinal extraction force to said implantable lead effective to cause the implantable lead to move in a proximal direction during removal of said implantable lead from anatomy;

wherein said implantable lead comprises a tubular cover that tears and everts upon extraction of said implantable lead, wherein upon eversion the tubular cover folds into itself.

20. The method of claim 19, wherein said implantable lead is for cardiac applications.

21. The method of claim 19, wherein said implantable lead is for neurological applications.

22. The method of claim 19, wherein said tubular cover comprises ePTFE.

23. The method of claim 19, wherein said method comprises separating said evertable tubular cover away from the medical device.

24. The method of claim 19, wherein said method comprises separating layers of said tubular cover in a double walled construction.