Lead assembly including a polymer interconnect and methods related thereto

• US 7,917,229 B2
• Filed: 08/31/2006
• Issued: 03/29/2011
• Est. Priority Date: 08/31/2006
• Status: Active Grant

• Current Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Original Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Inventors: Roman, Elliott Rodriguez, Zarembo, Paul E.
• Primary Examiner(s): Patel; Niketa I
• Assistant Examiner(s): Lavert; Nicole F
• Application Number:
  US11/468,996
• Publication Number:
  US 20080057784A1
• Time in Patent Office: 1,671 Days
• Field of Search: 607/119, 607/122
• US Class Current: 607/116
• CPC Class Codes: A61B 5/24 Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
• CPC Class Codes: A61N 1/04 Electrodes electrosurgical electrodes A61B18/14
• CPC Class Codes: A61N 1/056 Transvascular endocardial electrode systems
• CPC Class Codes: A61N 1/0565 Electrode heads
• CPC Class Codes: A61N 1/0587 Epicardial electrode systems; Endocardial electrodes piercing the pericardium
• CPC Class Codes: H01R 13/5224 for medical use
• CPC Class Codes: Y10T 29/49172 by molding of insulating material

Abstract

A lead assembly includes a ring component having mechanical coupling features, and at least one polymer component mechanically coupled with the mechanical coupling features of the ring component. Elongate tubing is disposed over the polymer component and is secured with the polymer component.

Claims

1. A lead assembly comprising a lead proximal end portion and a lead distal end portion, the lead proximal end portion adapted to be coupled to an implantable medical device, the lead assembly comprising:

a ring component located distal to the lead proximal end portion, the ring component having an outer surface including mechanical coupling features around at least a portion of the ring component;

at least one cylindrical polymer component having an inner surface mechanically coupled with the mechanical coupling features on the outer surface of the ring component;

a lead body extending from the lead proximal end portion to the lead distal end portion, the lead body comprising an elongate tubing defining an outer surface of the lead and having an inner surface fused with the outer surface of the polymer component such that the elongate tubing is in direct contact with the outer surface of the polymer component;

at least one conductor disposed within the elongate tubing, the at least one conductor extending from the proximal end portion towards the distal end portion of the lead; and

at least one electrode disposed on the lead body and electrically coupled with the at least one conductor.

2. The lead assembly as recited in claim 1, wherein the polymer component is coupled with the ring component with a snap fit coupling.

3. The lead assembly as recited in claim 1, wherein the polymer component is coupled with the ring component with an interference fit.

4. The lead assembly as recited in claim 1, wherein the polymer component is shrunk within a groove of the ring component.

5. The lead assembly as recited in claim 1, wherein the ring component has a textured surface, the textured surface contacts at least a portion of the polymer component.

6. The lead assembly as recited in claim 1, wherein the ring component has a recess receiving the polymer component therein.

7. The lead assembly as recited in claim 6, wherein the recess is defined by a width, and the width varies around at least a perimeter of the recess.

8. The lead assembly as recited in claim 1, wherein the at least one of the ring component or the polymer component has anti torque features.

9. The lead assembly as recited in claim 1, further comprising a seal disposed between the ring component and the polymer component.

10. A lead assembly comprising a lead proximal end portion and a lead distal end portion, the lead proximal end portion adapted to be coupled to an implantable medical device, the lead assembly comprising:

a ring component located distal to the lead proximal end portion, the ring component having an outer surface including mechanical coupling features, the mechanical coupling features including at least one recess formed in the outer surface of the ring component;

at least one cylindrical polymer component disposed within the at least one recess, the at least one polymer component having an outer surface and a lower melting point than the ring component;

a lead body extending from the lead proximal end portion to the lead distal end portion, the lead body comprising an elongate tubing defining an outer surface of the lead and having an inner surface fused with the outer surface of the polymer component;

at least one conductor disposed within the elongate tubing; and

at least one electrode disposed on the lead body and electrically coupled with the at least one conductor.

11. The lead assembly as recited in claim 10, wherein the ring component is a metal tip electrode.

12. The lead assembly as recited in claim 10, further comprising one or more seals disposed between the ring component and polymer component.

13. The lead assembly as recited in claim 12, further comprising an outer band disposed over the one or more seals.

14. The lead assembly as recited in claim 10, further comprising a metal tube within the ring component.

15. The lead assembly as recited in claim 10, wherein the polymer component is fused with the elongate tubing.

16. The lead assembly as recited in claim 15, further comprising an outer band disposed over the fused polymer component.

17. The lead assembly as recited in claim 10, wherein the polymer component is coupled with the ring component at an interface, and the interface includes a textured surface.

18. A method comprising:

disposing a cylindrical polymer component having an inner surface and an outer surface over an outer surface of a ring component, the outer surface of the ring component including mechanical coupling features;

coupling the inner surface of the polymer component with the mechanical coupling features on the outer surface of the ring component;

disposing one or more conductors within an elongate tubing;

electrically coupling the one or more conductors with one or more electrodes; and

fusing an inner surface of the elongate tubing with an outer surface of the polymer component.

19. The method as recited in claim 18, wherein electrically coupling the one or more conductors with one or more electrodes includes electrically coupling the one or more conductors with the ring component.

20. The method as recited in claim 18, further comprising placing a tube over the polymer component and the ring component, and heat shrinking the tube and the polymer component.

21. The method as recited in claim 18, wherein coupling the polymer component includes coupling with a snap fit coupling.

22. The method as recited in claim 18, wherein coupling the polymer component includes coupling with an interference fit.

23. The method as recited in claim 18, wherein coupling the polymer component includes shrinking the polymer component into a groove of the ring component.

24. The method as recited in claim 23, wherein shrinking the polymer component includes shrinking the polymer component into textured portions of the ring component.

25. The method as recited in claim 18, wherein coupling the polymer component includes applying energy.

26. The method as recited in claim 18, wherein coupling the polymer component includes overmolding the polymer component.

27. The method as recited in claim 18, wherein the polymer component includes at least a partially slitted portion therein, and coupling the polymer component includes sliding the slitted polymer over the ring component.