Low-profile connector for a neurostimulation lead

• US 7,798,864 B2
• Filed: 03/11/2009
• Issued: 09/21/2010
• Est. Priority Date: 03/12/2008
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Neuromodulation Corporation (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Neuromodulation Corporation (Boston Scientific Corporation)
• Inventors: Brase, Randy L., Flowers, Matthew B., Tong, Robert, Meadows, Paul M., Barker, John M.
• Primary Examiner(s): Nguyen; Truc T
• Application Number:
  US12/402,007
• Publication Number:
  US 20090233491A1
• Time in Patent Office: 559 Days
• Field of Search: 439/668
• US Class Current: 439/668
• CPC Class Codes: A61N 1/3752 Details of casing-lead connections
• CPC Class Codes: H01R 13/193 Means for increasing contact pressure at the end of engagement of coupling part , e.g. zero insertion force or no friction
• CPC Class Codes: H01R 2107/00 Four or more poles
• CPC Class Codes: H01R 2201/12 for medicine and surgery
• CPC Class Codes: H01R 24/58 Contacts spaced along longitudinal axis of engagement
• CPC Class Codes: H01R 43/26 for engaging or disengaging the two parts of a coupling device structural association with two-part coupling device H01R13/629

Abstract

An implantable connector, implantable lead assemblies, and implantable lead assembly kits are provided. The connector comprises an electrically insulative receptacle having a port configured for receiving an electrical lead body portion that carries an electrical terminal, and an electrical spring clip contact mounted within the receptacle. The electrical contact includes a collar and opposing lever arms. The collar is configured for being placed between an expanded state for receiving the terminal therein when the lead body portion is received within the port, and a collapsed state to firmly engage the terminal. The opposing lever arms are configured for being displaced using a tool to correspondingly place the collar between the expanded state and the collapsed state. The implantable connector can be incorporated into a lead and used to receive another lead to form the lead assembly. A tool can be provided with the connector to provide the lead assembly kit.

Claims

1. An implantable connector, comprising:

an electrically insulative receptacle having a port configured for receiving an electrical lead body portion that carries an electrical terminal;

an electrical spring clip contact mounted within the receptacle, the contact including a collar and opposing lever arms, the collar configured for being placed between an expanded state for receiving the terminal therein when the lead body portion is received within the port and a collapsed state for firmly engaging the terminal, the lever arms configured for being displaced using a tool to correspondingly place the collar between the expanded state and the collapsed state.

2. The implantable connector of claim 1, further comprising an electrical conductor connected to the contact.

3. The implantable connector of claim 1, wherein the contact has a spring force that urges the collar into the expanded state.

4. The implantable connector of claim 1, wherein the contact has a spring force that urges the collar into the collapsed state.

5. The implantable connector of claim 1, wherein the lever arms are configured for being displaced toward each other to correspondingly place the collar in the expanded state and for being displaced away each other to correspondingly place the collar in the collapsed state.

6. The implantable connector of claim 1, wherein the lever arms are configured for being displaced away from each other to correspondingly place the collar in the expanded state and for being displaced toward each other to correspondingly place the collar in the collapsed state.

7. The implantable connector of claim 1, wherein the electrical contact comprises a sheet of metal having first and second opposing edges, and wherein a first one of the lever arms extends from the first edge, a second one of the lever arms extends from the second edge, and the sheet of metal is wrapped around on itself, such that the lever arms oppose each other.

8. The implantable connector of claim 1, wherein the lever arms are axially offset from each other.

9. The implantable connector of claim 8, wherein the plurality of lever arms comprises two lever arms and a single lever arm opposing and axially interposed between the two lever arms.

10. The implantable connector of claim 1, wherein the receptacle has another port configured for receiving the tool.

11. The implantable connector of claim 1, wherein the lever arms are exposed outside of the receptacle, the implantable connector further comprising an electrically insulative cover configured for being interference fit over the lever arms.

12. The implantable connector of claim 1, wherein the port is configured for receiving an electrical lead body portion that carries a plurality of electrical terminals axially spaced along the lead body portion, the implantable connector comprising a plurality of electrical spring clip contacts axially mounted within the receptacle, each of the contacts including a collar and opposing lever arms, the collars configured for being placed between an expanded state for receiving the respective terminals therein when the lead body portion is received within the port and a collapsed state for firmly engaging the respective terminals, the lever arms configured for being displaced using a tool to correspondingly place the collars between the expanded state and the collapsed state.

13. An implantable lead assembly, comprising:

a first electrical lead having a first lead body portion and an electrical terminal carried by the first lead body portion; and

a second electrical lead having second lead body portion and a connector carried by the second lead body portion, the connector comprising an electrically insulative receptacle having a port configured for receiving the first lead body portion, and an electrical spring clip contact mounted within the receptacle, the contact including a collar and opposing lever arms, the collar configured for being placed between an expanded state for receiving the terminal therein when the first lead body portion is received within the port and a collapsed state to firmly engage the terminal, the lever arms configured for being displaced using a tool to correspondingly place the collar between the expanded state and the collapsed state.

14. The implantable lead assembly of claim 13, wherein the connector further comprises an electrical conductor connected to the contact and extending through the second lead body portion.

15. The implantable lead assembly of claim 13, wherein the contact has a spring force that urges the collar into the expanded state.

16. The implantable lead assembly of claim 13, wherein the contact has a spring force that urges the collar into the collapsed state.

17. The implantable lead assembly of claim 13, wherein the lever arms are configured for being displaced toward each other to correspondingly place the collar in the expanded state and for being displaced away each other to correspondingly place the collar in the collapsed state.

18. The implantable lead assembly of claim 13, wherein the lever arms are configured for being displaced away from each other to correspondingly place the collar in the expanded state and for being displaced toward each other to correspondingly place the collar in the collapsed state.

19. The implantable lead assembly of claim 13, wherein the electrical contact comprises a sheet of metal having first and second opposing edges, and wherein a first one of the lever arms extends from the first edge, a second one of the lever arms extends from the second edge, and the sheet of metal is wrapped around on itself, such that the lever arms oppose each other.

20. The implantable lead assembly of claim 13, wherein the lever arms are axially offset from each other.

21. The implantable lead assembly of claim 13, wherein the plurality of lever arms comprises two lever arms and a single lever arm opposing and axially interposed between the two lever arms.

22. The implantable lead assembly of claim 13, wherein the receptacle has another port configured for receiving the tool.

23. The implantable lead assembly of claim 13, wherein the lever arms are exposed outside of the receptacle, the connector further comprising an electrically insulative cover configured for being interference fit over the lever arms.

24. The implantable lead assembly of claim 13, wherein the first lead body portion is a proximal lead body portion, and the first electrical lead further comprises a distal lead body portion and an electrode carried by the distal lead body portion.

25. The implantable lead assembly of claim 13, wherein the first electrical lead has a plurality of electrical terminals axially spaced along the first lead body portion, the connector comprising a plurality of electrical spring clip contacts axially mounted within the receptacle, each of the electrical contacts including a collar and opposing lever arms, the collars configured for being placed between an expanded state for receiving the respective electrical terminals therein when the first lead body portion is received within the port and a collapsed state for firmly engaging the respective electrical terminals, the lever arms configured for being displaced using a tool to correspondingly place the collars between the expanded state and the collapsed state.

26. An implantable lead assembly kit, comprising:

an electrical lead comprising a lead body portion and an electrical terminal carried by the lead body portion;

a tool; and

a connector comprising an electrically insulative receptacle having a port configured for receiving the lead body portion, and an electrical spring clip contact mounted within the receptacle, the contact including a collar and opposing lever arms, the collar configured for being placed between an expanded state for receiving the terminal therein when the lead body portion is received within the port and a collapsed state to firmly engage the terminal, the lever arms configured for being displaced using a tool to correspondingly place the collar between the expanded state and the collapsed state.

27. The implantable lead assembly kit of claim 26, wherein the connector further comprises an electrical conductor connected to the contact.

28. The implantable lead assembly kit of claim 26, wherein the contact has a spring force that urges the collar into the expanded state.

29. The implantable lead assembly kit of claim 26, wherein the contact has a spring force that urges the collar into the collapsed state.

30. The implantable lead assembly kit of claim 26, wherein the lever arms are configured for being displaced toward each other to correspondingly place the collar in the expanded state and for being displaced away each other to correspondingly place the collar in the collapsed state.

31. The implantable lead assembly kit of claim 26, wherein the lever arms are configured for being displaced away from each other to correspondingly place the collar in the expanded state and for being displaced toward each other to correspondingly place the collar in the collapsed state.

32. The implantable lead assembly kit of claim 26, wherein the electrical contact comprises a sheet of metal having first and second opposing edges, and wherein a first one of the lever arms extends from the first edge, a second one of the lever arms extends from the second edge, and the sheet of metal is wrapped around on itself, such that the lever arms oppose each other.

33. The implantable lead assembly kit of claim 26, wherein the lever arms are axially offset from each other.

34. The implantable lead assembly kit of claim 26, wherein the plurality of lever arms comprises two lever arms and a single lever arm opposing and axially interposed between the two lever arms.

35. The implantable lead assembly kit of claim 26, wherein the receptacle has another port configured for receiving the tool.

36. The implantable lead assembly kit of claim 26, wherein the lever arms are exposed outside of the receptacle, the connector further comprising an electrically insulative cover configured for being interference fit over the lever arms.

37. The implantable lead assembly kit of claim 26, wherein the tool comprises a pin configured for being inserted between the lever arms to displace the lever arms away from each other.

38. The implantable lead assembly kit of claim 26, wherein the tool comprises a pair of tool arms configured for being placed between a closed state and inserted between the lever arms, and an open state to displace the lever arms away from each other.

39. The implantable lead assembly kit of claim 26, wherein the electrical lead has a plurality of electrical terminals axially spaced along the lead body portion, the connector comprising a plurality of electrical spring clip contacts axially mounted within the receptacle, each of the electrical contacts including a collar and opposing lever arms, the collars configured for being placed between an expanded state for receiving the respective electrical terminals therein when the lead body portion is received within the port and a collapsed state for firmly engaging the respective electrical terminals, the lever arms configured for being displaced using a tool to correspondingly place the collars between the expanded state and the collapsed state.