US 12,420,103 B1
Neurostimulation leads with reduced current leakage
Henry Lee, Irvine, CA (US); Prabodh Mathur, Laguna Niguel, CA (US); and Guangqiang Jiang, Irvine, CA (US)
Assigned to Axonics, Inc., Irvine, CA (US)
Filed by Axonics, Inc., Irvine, CA (US)
Filed on Aug. 18, 2021, as Appl. No. 17/405,721.
Claims priority of provisional application 63/068,299, filed on Aug. 20, 2020.
Int. Cl. A61N 1/375 (2006.01); A61N 1/05 (2006.01); A61N 1/36 (2006.01); B29C 45/26 (2006.01); B29K 75/00 (2006.01)
CPC A61N 1/3752 (2013.01) [A61N 1/05 (2013.01); A61N 1/36142 (2013.01); B29C 45/261 (2013.01); B29K 2075/00 (2013.01)] 23 Claims
OG exemplary drawing
 
1. An implantable neurostimulation lead comprising:
a lead body having a proximal portion and a distal portion, wherein the lead body has one or more proximal apertures along the proximal portion and one or more distal apertures along the distal portion;
a lumen extending the length of the lead body;
one or more electrodes positioned along an exterior of the lead body at the distal portion of the lead body;
one or more connector interfaces positioned along the exterior of the lead body at the proximal portion of the lead body, each connector interface configured to engage with a respective connector of a pulse generator;
one or more conductors extending through an interior of the lead body, each of the conductors having a proximal end and a distal end, wherein the proximal end exits the interior of the lead body via a respective proximal aperture to couple with a respective connector interface, and wherein the distal end exits the interior of the lead body via a respective distal aperture to couple with a respective electrode, each conductor coupling a respective electrode with a respective connector interface; and
a multi-filar filler element comprising a plurality of coiled filars positioned to occupy at least a portion of one or more gaps in the interior of the lead body resulting from the exit of one or more of the one or more conductors from the lead body, wherein the first filler element comprises an electrically nonconductive material, wherein the number of filars decreases in the proximal direction at the distal portion of the lead body.