Sacral lead anchoring system

• US 5,484,445 A
• Filed: 10/12/1993
• Issued: 01/16/1996
• Est. Priority Date: 10/12/1993
• Status: Expired due to Term

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Knuth, Henricus M.
• Primary Examiner(s): Pellegrino, Stephen C.
• Assistant Examiner(s): SCHMIDT, JEFFREY
• Application Number:
  US08/135,108
• Time in Patent Office: 826 Days
• Field of Search: 606/53, 606/60, 606/61, 606/62, 606/69, 606/70, 606/71, 606/76, 606/129, 606/151, 606/232, 606/228, 604/174, 604/175, 607/36, 607/39, 607/40, 607/41, 607/43, 607/57, 607/149, 607/152, 607/115-118, 607/138
• US Class Current: 606/129
• CPC Class Codes: A61N 1/02 Details
• CPC Class Codes: Y10S 606/91 Polymer

Abstract

A simple and reliable system for anchoring a lead to the sacrum. The system provides a pliant slid-on anchoring sleeve featuring a suturing groove for lead fixation and a base having screw tabs for anchoring the sleeve and thus the lead to the sacrum. The base is reinforced, preferably through a mesh, to prevent tearing caused by screw forces. In addition an elongate washer may be further used in conjunction with screws to anchor the system to bone.

Claims

1. A system for anchoring a lead to the sacrum comprising:

a base, said base having at least one mounting hole therethrough, said base having a lead hole therethrough;

a sleeve mounted to said base, said sleeve having a lead lumen therethrough, said lead lumen corresponding with said lead hole through said base, said lead lumen having means for fixing said lead to said sleeve, said sleeve and lumen being substantially parallel to said base;

at least one fastener to be introduced through said mounting hole into said sacrum and thereby anchor the lead; and

a stress distribution member to distribute the stress exerted from said fastener on said base.

2. The system of claim 1 wherein said base and sleeve are constructed from a pliant material.

3. The system of claim 1 wherein said base includes a reinforcing member.

4. The system of claim 3 wherein said reinforcing member is a nylon mesh.

5. The system of claim 1 wherein said stress distribution member is an elongate dog-bone shaped washer.

6. The system of claim 1 wherein said means for fixing said lead to said sleeve comprises a plurality of suture tabs in said sleeve.

7. A system for anchoring a lead to bone comprising:

a base, said base having at least one mounting hole therethrough;

a sleeve mounted to said base, said sleeve having a lead lumen therethrough, said lead lumen having a plurality of suture tabs therein to attach said sleeve to said lead, said sleeve having means for moving from a substantially parallel relation to said base to a substantially parallel relation to a hole in said bone;

at least one fastener to be introduced through said mounting hole into said bone and thereby anchor the lead; and

a stress distribution member to distribute the stress exerted from said fastener on said base.

8. The system of claim 7 wherein said base and sleeve are constructed from a pliant material.

9. The system of claim 7 wherein said base includes a reinforcing member.

10. The system of claim 9 wherein said reinforcing member is a nylon mesh.

11. The system of claim 7 wherein said stress distribution member is an elongate dog-bone shaped washer.

12. A system for anchoring a lead to bone comprising:

a base, said base having at least one mounting hole therethrough, said base constructed from a pliant material, said base further having a reinforcing member to prevent said base from tearing proximate said at least one mounting hole;

a sleeve mounted to said base, said sleeve having a lead lumen therethrough, said lead lumen having a plurality of suture tabs therein to attach said sleeve to said lead, said sleeve having means for moving from a substantially parallel relation to said base, wherein said lead lumen has a curve, to a substantially parallel relation to a hole in said bone, wherein said lead lumen is straight;

at least one fastener to be introduced through said mounting hole into said bone and thereby anchor the lead; and

a stress distribution member to distribute the stress exerted from said fastener on said base.

13. The system of claim 12 wherein said reinforcing member is a nylon mesh.

14. A system for anchoring a lead to a bone comprising:

a base having at least one mounting hole therethrough, the base having a lead hole therethrough, the base having a sleeve, the sleeve having a lead lumen therethrough, the lead lumen coaxial with the lead hole, the lead lumen having means for fixing a lead to the sleeve;

a stress distribution member positioned on the base, the stress distribution member having a screw hole; and

a mounting screw positioned in the screw hole and through the mounting hole.

15. The system of claim 14 wherein the sleeve and lumen are substantially parallel to the base.

16. The system of claim 14 wherein the base and sleeve are constructed from a pliant material.

17. The system of claim 14 wherein the base includes a reinforcing member.

18. The system of claim 17 wherein the reinforcing member is a nylon mesh.

19. The system of claim 14 wherein the stress distribution member is an elongate dog-bone shaped washer.

20. The system of claim 14 wherein the means for fixing the lead to the sleeve comprises a plurality of suture tabs in the sleeve.

21. A system for anchoring a lead to a bone comprising:

a base having at least one mounting hole therethrough, the base having a lead hole therethrough, the base having a sleeve, the sleeve having a lead lumen therethrough, the lead lumen coaxial with the lead hole, the sleeve having means for moving from a substantially parallel relation to the base to a substantially non-parallel relation to the base;

a stress distribution member positioned on the base, the stress distribution member having a screw hole; and

a mounting screw positioned in the screw hole and through the mounting hole.