Systems and methods for anchoring leads of electrical stimulation systems in and around bony structures
View Patent ↗A lead assembly includes a nerve stimulation lead and at least one anchoring unit. The nerve stimulation lead includes electrodes disposed at a distal end that are electrically coupled to terminals disposed at the proximal end by a plurality of conductive wires. The at least one anchoring unit includes at least one elongated member and at least one fastener. The at least one elongated member extends along at least a portion of the nerve stimulation lead with a distal end of the at least one elongated member extending outwards from the nerve stimulation lead in proximity to the distal end of the nerve stimulation lead. The at least one fastener is attached to the distal end of the at least one elongated member and is configured and arranged for anchoring the at least one elongated member against a bony structure or against soft tissue abutting a bony structure.
1. A lead assembly comprising:
a nerve stimulation lead with a distal end, a proximal end, an outer surface, and a longitudinal length, the nerve stimulation lead comprising:
a plurality of electrodes disposed at the distal end of the nerve stimulation lead,
a plurality of terminals disposed along the proximal end of the nerve stimulation lead,
at least one port defined in the outer layer proximal to the plurality of electrodes, and
a plurality of conductive wires electrically coupling the plurality of electrodes to the plurality of terminals; and
at least one anchoring unit configured and arranged for anchoring the nerve stimulation lead against a bony structure or against soft tissue abutting a bony structure and for remaining permanently coupled to the nerve stimulation lead while the nerve stimulation lead is anchored against the bony structure or against soft tissue abutting the bony structure, the at least one anchoring unit comprising
at least one elongated member having a distal end and a proximal end, the at least one elongated member extending along at least a portion of the nerve stimulation lead beneath the outer layer of the nerve stimulation lead with the distal end of the at least one elongated member extending outwards from the port, wherein the portion of the nerve stimulation lead along which the at least one elongated member extends beneath the outer layer of the nerve stimulation lead is proximal to the port, and
at least one fastener attached to the distal end of the at least one elongated member, the at least one fastener configured and arranged for anchoring the at least one elongated member against a bony structure or against soft tissue abutting a bony structure.
2. The lead assembly of claim 1 , wherein the at least one elongated member comprises a drive element.
3. The lead assembly of claim 1 , wherein the at least one fastener is a rotary device configured and arranged for anchoring the at least one elongated member against a bony structure or against soft tissue by rotation of the at least one fastener.
4. The lead assembly of claim 1 , wherein the at least one elongated member is removably coupled to the nerve stimulation lead.
5. The lead assembly of claim 1 , wherein the at least one elongated member is disposed in a sheath coupled to the nerve stimulation lead.
6. The lead assembly of claim 5 , wherein the sheath is permanently coupled to the nerve stimulation lead.
7. The lead assembly of claim 5 , wherein the sheath is removably coupled to the nerve stimulation lead.
8. The lead assembly of claim 1 , wherein the at least one elongated member comprises a guide wire.
9. The lead assembly of claim 1 , wherein the at least one fastener comprises at least one of a pin, a staple, a screw, or a suturable wire.
10. An electrical stimulating system comprising:
the lead assembly of claim 1 ; and
a control module configured and arranged to electrically couple to the proximal end of the nerve stimulation lead, the control module comprising
a housing, and
an electronic subassembly disposed in the housing; and
a connector for receiving the nerve stimulation lead of the lead assembly, the connector having a proximal end and a distal end, the connector comprising
a connector housing defining a port at the distal end of the connector, the port configured and arranged for receiving the proximal end of the nerve stimulation lead, of the lead assembly, and
a plurality of connector contacts disposed in the connector housing, the connector contacts configured and arranged to couple to at least one of the plurality of terminals disposed on the proximal end of the nerve stimulation lead of the lead assembly.
11. The lead assembly of claim 1 , wherein the at least one fastener is configured and arranged for anchoring the at least one elongated member against a bony structure or against soft tissue abutting a bony structure with the at least one fastener aligned along the longitudinal length of the neurostimulation lead with a portion of the neurostimulation lead that is distal to the port and proximal to the plurality of electrodes.
12. The lead assembly of claim 1 , wherein the at least one fastener is configured and arranged for anchoring the at least one elongated member against a bony structure or against soft tissue abutting a bony structure with the at least one fastener aligned along the longitudinal length of the neurostimulation lead with the plurality of electrodes.