US 2017/0303976 A1 · REDUCTION SLEEVE

Abstract

A reduction sleeve for facilitating insertion of a spinal rod into a rod-receiving channel formed in a bone fixation element. The reduction sleeve may include a through-bore sized and configured to receive the bone fixation element and a substantially transverse channel sized and configured to receive the spinal rod. The channel being substantially aligned with the rod-receiving channel formed in the bone fixation element so that, once the bone fixation element has been inserted into the reduction sleeve, the spinal rod can pass through the aligned channels. The reduction sleeve may also include at least one break-off point or region for facilitating breaking and removal of the reduction sleeve once the spinal rod has been clamped into the rod-receiving channel of the bone fixation element. The reduction sleeve may also include a plurality of threads formed thereon for engaging a reduction instrument, an alignment mechanism so that the bone fixation element can only be inserted into the reduction sleeve when the rod-receiving channels are aligned, and an inwardly projecting protrusion formed on the inner surface of the reduction sleeve so that, once inserted, the projection contacts a top surface formed on the bone fixation element.

Claims37

Dependent claims

A reduction sleeve for facilitating insertion of a longitudinal spinal rod into a bone fixation element, the bone fixation element including a bone anchor and a head portion having a rod-receiving channel formed therein for receiving the spinal rod, the reduction sleeve comprising:

a longitudinal axis, an upper end, a lower end, an outer surface, a channel, and a through-bore extending from the upper end to the lower end, the through bore defining an inner surface;
wherein the through-bore is substantially perpendicular to the longitudinal axis and the through-bore is sized and configured to receive the bone fixation element;
and
wherein the channel is substantially transverse to the longitudinal axis and the channel is substantially aligned with the rod-receiving channel formed in the bone fixation element so that, once the bone fixation element has been inserted into the reduction sleeve, the spinal rod can pass through the channel formed in the reduction sleeve and the rod-receiving channel formed in the bone fixation element;
the reduction sleeve further comprising at least one break-off point or region for facilitating breaking the reduction sleeve into multiple pieces.

2 more elements

a longitudinal axis, an upper end, a lower end, an outer surface, a channel, and a through-bore extending from the upper end to the lower end, the through-bore defining an inner surface;
wherein the through-bore is substantially perpendicular to the longitudinal axis and the through-bore is sized and configured to receive the bone fixation element;
and
wherein the channel is substantially transverse to the longitudinal axis and the channel defines a pair of spaced apart arms having a top surface;
and
wherein the top surface of the spaced apart arms formed in the reduction sleeve are sized and configured to extend above the top surface formed in the bone fixation element by a distance A, when the bone fixation element is inserted into the reduction sleeve;
and
wherein the reduction sleeve further comprises at least one break-off point or region for facilitating breaking the reduction sleeve into multiple pieces.

5 more elements

a longitudinal axis;
an upper end;
a lower end having a tapered surface sized and configured to contact a correspondingly tapered surface formed on the bone fixation element when the bone fixation element is inserted into the reduction sleeve;
an outer surface having a plurality of threads formed thereon for engaging a reduction instrument;
a through-bore extending from the upper end to the lower end, the through-bore defining an inner surface, the inner surface having an inwardly projecting protrusion formed thereon;
and
a channel;
wherein the through-bore is substantially perpendicular to the longitudinal axis and the through-bore is sized and configured to receive the bone fixation element;
and
wherein the channel is substantially transverse to the longitudinal axis and the channel defines a pair of spaced apart arms having a top surface;
and
wherein the reduction sleeve further comprises at least one break-off point or region for facilitating breaking the reduction sleeve into multiple pieces;
and
wherein the inwardly projecting protrusion formed on the inner surface of the reduction sleeve is sized and configured to contact the top surface of the bone fixation element, once the bone fixation element has been inserted into the reduction sleeve, so that the bone fixation element can be secured within the reduction sleeve in-between the tapered surface formed in the lower end of the reduction sleeve and the inwardly projecting protrusion.

11 more elements

Dependencies are inferred from the claim text.

Reduction sleeve

Life of this patent

Reduction sleeve

Life of this patent

Abstract

Claims37