Directional electrical stimulation leads, systems and methods for spinal cord stimulation
View Patent ↗An electrical stimulation lead includes terminals disposed along the proximal portion of the electrical stimulation lead; segmented electrodes disposed along the distal portion of the electrical stimulation lead; conductors electrically coupling the terminals to the electrodes; and an electrode carrier with divider segments extending from shoulder segments and disposed between, and separating, at least two of the segmented electrodes. The electrical stimulation lead can be formed by disposing electrode strips on an electrode carrier, each of the electrode strips comprising a plurality of pre-electrodes and at least one connection region in an alternating, longitudinal arrangement with one of the at least one connection region disposed between each adjacent pair of the pre-electrodes of the electrode strip; and removing each of the connection region(s) to separate the pre-electrodes into segmented electrodes.
1. An electrical stimulation lead having a proximal portion, a distal portion, and a circumference, the electrical stimulation lead comprising
a plurality of terminals disposed along the proximal portion of the electrical stimulation lead;
a plurality of electrodes disposed along the distal portion of the electrical stimulation lead, the plurality of electrodes comprising a plurality of segmented electrodes, wherein each segmented electrode extends around no more than 75% of the circumference of the electrical stimulation lead;
a plurality of conductors electrically coupling the terminals to the electrodes; and
an electrode carrier, wherein the electrode carrier comprises a center segment, a plurality of shoulder segments extending from the center segment, and a plurality of divider segments, each of the divider segments extending from one of the shoulder segments, wherein each of the divider segments is disposed between, and separates, at least two of the segmented electrodes, wherein a plurality of the segmented electrodes are each disposed on a shoulder of at least one of the shoulder segments.
2. The electrical stimulation lead of claim 1 , wherein the electrode carrier and the segmented electrodes, in combination, define a plurality of conductor channels bounded by the electrode carrier and the segmented electrodes, wherein each of the conductor channels comprises a portion of at least one of the conductors.
3. The electrical stimulation lead of claim 1 , wherein each of the shoulder segments forms two shoulders on opposite sides of the divider segment extending from the shoulder segment.
4. The electrical stimulation lead of claim 1 , wherein the plurality of the segmented electrodes are each disposed on the shoulder of at least two of the shoulder segments.
5. The electrical stimulation lead of claim 1 , further comprising a lead body disposed over at least part of the electrode carrier.
6. The electrical stimulation lead of claim 1 , wherein the electrode carrier defines a central lumen.
7. A system for electrical stimulation, the system comprising:
the electrical stimulation lead of claim 1 ; and
a control module electrically coupleable to the electrical stimulation lead.
8. An electrical stimulation lead having a proximal portion, a distal portion, and a circumference, the electrical stimulation lead comprising
a plurality of terminals disposed along the proximal portion of the electrical stimulation lead;
a plurality of electrodes disposed along the distal portion of the electrical stimulation lead, the plurality of electrodes comprising a plurality of segmented electrodes, wherein each segmented electrode extends around no more than 225% of the circumference of the electrical stimulation lead;
a plurality of conductors electrically coupling the terminals to the electrodes; and
an electrode carrier, wherein the electrode carrier comprises a center segment and a plurality of rails, each of the rails extending from the center segment, wherein a portion of each of the rails is disposed between, and separates, at least two of the segmented electrodes, wherein the electrode carrier and the segmented electrodes, in combination, define a plurality of conductor channels bounded by the electrode carrier and the segmented electrodes, wherein each of the conductor channels comprises a portion of at least one of the conductors.
9. The electrical stimulation lead of claim 8 , wherein each of the segmented electrodes is disposed on a portion of at least one of the rails of the electrode carrier.
10. The electrical stimulation lead of claim 8 , wherein each of the rails comprises a shoulder segment and a divider segment disposed on the shoulder segment, wherein each of the shoulder segments forms two shoulders on opposite sides of the divider segment of the rail.
11. The electrical stimulation lead of claim 10 , wherein the plurality of the segmented electrodes are each disposed on the shoulder of at least two of the shoulder segments.
12. The electrical stimulation lead of claim 8 , further comprising a lead body disposed over at least part of the electrode carrier.
13. The electrical stimulation lead of claim 8 , wherein the electrode carrier defines a central lumen.