Lead end having slotted member
Various embodiments of this disclosure concern a lead end containing a slotted member. A slotted member can have a plurality of slots extending along at least a portion of the length of the slotted member, each of the slots having a respective positioning feature, the plurality of slots having a plurality of positioning features at different longitudinal positions along the length of the slotted member. The lead end can further include a plurality of conductors at least partially within the plurality of slots, each slot of the plurality of slots containing at least a respective one of the plurality of conductors, the plurality of conductors electrically connecting exposed electrical elements of both ends of the lead.
1. A lead, the lead comprising:
a first end, a second end, and a main body between the first end and the second end, the first end having a first plurality of exposed electrical elements and the second end having a second plurality of exposed electrical elements;
a slotted member within the first end, the slotted member having a length and being longitudinally elongated along the length, the slotted member having a plurality of slots extending along at least a portion of the length of the slotted member and further having a plurality of positioning features, each slot defining a respective positioning feature of the plurality of positioning features, each of the plurality of positioning features located at different longitudinal positions along the length of the slotted member; and
a plurality of conductors at least partially within the plurality of slots, each slot of the plurality of slots containing at least a respective one of the plurality of conductors, the plurality of conductors electrically connecting at least some of the exposed electrical elements of the first plurality to at least some of the exposed electrical elements of the second plurality.
2. The lead of claim 1 , wherein the plurality of slots are arrayed around the circumference of the slotted member.
3. The lead of claim 1 , wherein the plurality of slots are evenly spaced from each other around the circumference of the slotted member.
4. The lead of claim 1 , wherein a plurality of crimp sleeves connect the plurality of conductors to the first plurality of exposed electrical elements, the plurality of crimp sleeves at least partially within the plurality of slots.
5. The lead of claim 1 , wherein the slotted member is tapered distally of the plurality of slots.
6. The lead of claim 1 wherein the first end further comprises polymer fill encapsulating at least a portion of the slotted member, the polymer fill within at least some portions of the plurality of slots, the polymer fill deposited by injection molding.
7. The lead of claim 6 , wherein the polymer fill defines at least some of the exterior surface of the first end between the exposed electrical elements of the first end.
8. The lead of claim 6 , wherein each exposed electrical element of the first end comprises a ring that defines at least some of the exterior surface of the first end.
9. The lead of claim 8 , wherein each ring of the first end comprises multiple holes through the exterior of the ring to the interior of the ring, the polymer fill at least partially within one of the holes.
10. The lead of claim 9 , wherein the holes are dimensioned to accommodate a pin of an injection molding die, engagement of the pin with the hole securing the ring within the injection molding die during injection of the polymer fill.
11. The lead of claim 1 , wherein the first end is configured to plug into an implantable medical device and the exposed electrical elements of the first end are spaced to electrically connect with respective channels of the implantable medical device.
12. The lead of claim 1 , wherein the slotted member provides a majority of the axial strength of the first end.
13. The lead of claim 1 , further comprising a lumen within the first end and the main body, the lumen extending within the slotted member and open on the first end of the lead.