Electrode leads having nerve contact elements with coil contacts and associated systems and methods
View Patent ↗An electrode lead including an elongate lead body and a nerve cuff (or other nerve contact element) including an electrically insulative cuff body (or other contact body) affixed to the distal end of the lead body and at least one electrically conductive coil partially embedded in the cuff body (or other contact body) such that there are non-embedded portions, which together define a flexible coil contact that is associated with the front outer surface of the cuff body (or other contact body), and embedded portions.
1. An electrode lead, comprising:
an elongate lead body having a proximal end and a distal end; and
a nerve cuff including
a biologically compatible, elastic, electrically insulative cuff body affixed to the distal end of the lead body, the cuff body being configured to be circumferentially disposed around a nerve, having a pre-set furled state that defines an inner lumen, being movable to an unfurled state, including a front outer surface that faces the inner lumen when the cuff body is in the furled state and a rear outer surface, and defining a length, a length direction, a width in the unfurled state that is greater than the length, and a width direction, and
a plurality of electrically conductive coils that extend in the width direction, that are electrically connected to one another in parallel, and that are partially embedded in the cuff body such that each coil has coiled non-embedded portions, which together define a coil contact that projects outwardly from the front outer surface toward the inner lumen when the cuff body is in the furled state, and embedded portions.
2. An electrode lead as claimed in claim 1 , wherein
the plurality of electrically conductive coils comprises a first plurality of electrically conductive coils together define a first coil contact; and
the electrode lead further comprises a second plurality of electrically conductive coils that extend in the width direction, that are electrically connected to one another in parallel, and that are partially embedded in the cuff body such that each coil has coiled non-embedded portions, which together define a second coil contact that projects outwardly from the front outer surface toward the inner lumen when the cuff body is in the furled state, and embedded portions.
3. An electrode lead as claimed in claim 2 , wherein
each of the electrically conductive coils of the second coil contact defines a central axis; and
the central axes of at least two of the plurality of electrically conductive coils of the second coil contact are parallel to one another.
4. An electrode lead as claimed in claim 2 , wherein
the first and second coil contacts are relatively wide coil contacts that are separated from one another in the length direction; and
the electrode lead further comprises a plurality of relatively narrow contacts that are located between the relatively wide coil contacts.
5. An electrode lead as claimed in claim 4 , wherein
the relatively narrow contacts comprise flat contacts.
6. An electrode lead as claimed in claim 4 , wherein
the relatively narrow contacts comprise coil contacts.
7. An electrode lead as claimed in claim 1 , further comprising:
a wire, connected to the coil contact, that extends to the proximal end of the lead body.
8. An electrode lead as claimed in claim 1 , wherein
the electrically conductive coils comprise helical coils.
9. An electrode lead as claimed in claim 1 , wherein
the electrically conductive coils each define a central axis; and
the front outer surface of the cuff body and each of the central axes lie in a common plane.
10. An electrode lead as claimed in claim 1 , wherein
the electrically conductive coils each define a central axis; and
each of the central axes are parallel to the front outer surface of the cuff body.
11. An electrode lead, comprising:
an elongate lead body having a proximal end and a distal end; and
a nerve paddle including
a biologically compatible, elastic, electrically insulative paddle body affixed to the distal end of the lead body, the contact body including front and rear outer surfaces, and defining a length, a length direction, a width, and a width direction, and
at least one electrically conductive coil partially embedded in the paddle body such that there are non-embedded portions, which together define a coil contact that is associated with the front outer surface, and embedded portions.
12. An electrode lead as claimed in claim 11 , wherein
the at least one electrically conductive coil comprises a plurality of electrically conductive coils that are partially embedded in the paddle body such that each coil has non-embedded portions and embedded portions; and
a plurality of coil contacts that are associated with the front outer surface and are respectively defined by the non-embedded portions of each electrically conductive coil.
13. An electrode lead as claimed in claim 12 , wherein
each of the electrically conductive coils defines a central axis having a shape; and
at least two of the plurality of electrically conductive coils have differently shaped central axes.
14. An electrode lead as claimed in claim 12 , wherein
at least two of the coil contacts are relatively wide coil contacts that are separated from one another in the length direction; and
the electrode lead further comprises a plurality of relatively narrow contacts that are located between the relatively wide coil contacts.
15. An electrode lead as claimed in claim 14 , wherein
the relatively narrow contacts comprise coil contacts.
16. An electrode lead as claimed in claim 11 , wherein
the non-embedded portions of the at least one electrically conductive coil project outwardly from the front outer surface of the paddle body.
17. An electrode lead as claimed in claim 11 , wherein
the at least one electrically conductive coil defines a central axis having a shape selected from the group consisting of a spiral shape, an m-shape, a wave-like shape, and a closed geometric shape.
18. An electrode lead as claimed in claim 11 , wherein
the at least one electrically conductive coil comprises a helical coil.
19. An electrode lead as claimed in claim 11 , wherein
the at least one electrically conductive coil defines a central axis; and
the central axis and the front outer surface of the paddle body lie in a common plane.