US 12,329,415 B2
Spinal rod with multiple sections having eccentric centers
Michael J. Seiler, Charlottesville, VA (US); and Rex W. Armstrong, Cordova, TN (US)
Assigned to WARSAW ORTHOPEDIC, INC., Warsaw, IN (US)
Filed by Warsaw Orthopedic, Inc., Warsaw, IN (US)
Filed on Feb. 3, 2023, as Appl. No. 18/163,969.
Prior Publication US 2024/0260994 A1, Aug. 8, 2024
Int. Cl. A61B 17/56 (2006.01); A61B 17/70 (2006.01)
CPC A61B 17/56 (2013.01) [A61B 2017/564 (2013.01); A61B 17/7002 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A spinal rod with multiple sections having eccentric centers, comprising:
a first longitudinal portion extending along a first longitudinal axis and having a first cross-section and a first end portion, the first longitudinal axis extending lengthwise through a center of the first longitudinal portion;
a second longitudinal portion extending along a second longitudinal axis having a second cross-section and a second end portion opposite the first end portion, the second longitudinal axis extending lengthwise through a center of the second longitudinal portion; and
a transition portion adjoining the first longitudinal portion and the second longitudinal portion that is configured to transition from the first cross-section to the second cross-section,
wherein the first longitudinal axis is offset with respect to the second longitudinal axis and the first longitudinal axis and the second longitudinal axis extend parallel with respect to one another,
wherein a first bottom outside surface of the first longitudinal portion extending from the first end portion and towards the second end portion extends along a first co-extensive plane with a second bottom outside surface of the second longitudinal portion extending from the second end portion and towards the first end portion,
wherein the first bottom outside surface and the second bottom outside surface extend along the co-extensive plane at the same relative height,
wherein a first upper outside surface of the first longitudinal portion extending from the first end portion and towards the second end portion extends along a first upper plane with a second upper outside surface of the second longitudinal portion extending from the second end portion and towards the first end portion extends along a second upper plane,
wherein, in a side profile view, the first upper plane is vertically offset with respect to the second upper plane and the first upper plane and the second upper plane extend parallel with respect to one another, and
wherein a first end of the spinal rod comprises the first cross-section and a second end of the spinal rod opposite the first end of the spinal rod comprises the second cross-section.