Break-off set screw
AssigneeWarsaw Orthopedic, Inc.
InventorsNicholas Benson, William A. Rezach, Arjun S. Kurian, Newton H Metcalf, Jr.
Life of this patent
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Abstract
A load sensing assembly for a spinal implant includes a set screw having a central opening that extends from a first end of the set screw toward a second end of the set screw. The second end of the set screw is configured to engage with an anchoring member. The load sensing assembly includes an antenna, an integrated circuit in communication with the antenna, where the integrated circuit is positioned within the central opening of the set screw, and a strain gauge in connection with the integrated circuit. The strain gauge is located within the central opening of the set screw in proximity to the second end of the set screw.
Claims18
A load sensing assembly for a spinal implant, the load sensing assembly comprising:
- a break-off set screw comprising a break-off head coupled to an adjustment head via a break-off region, and a bore extending from an outer surface of the break-off head to at least a threaded portion of the break-off set screw;
- an antenna;
- an integrated circuit in communication with the antenna;
- and
- a strain gauge in connection with the integrated circuit,
- wherein the integrated circuit and strain gauge are positioned within the bore of the set screw, and
- wherein the threaded portion of the break-off set screw is configured to fasten to an anchoring member supporting a longitudinal rod, and
- wherein the strain gauge is configured to measure a localized force between the break-off set screw and the longitudinal rod when the break-off set screw contacts the longitudinal rod.
A load sensing assembly for a spinal implant, the load sensing assembly comprising:
- a break-off set screw comprising a break-off head coupled to an adjustment head via a break-off region, and a bore extending from an outer surface of the break-off head to a threaded portion of the break-off set screw;
- an antenna;
- an integrated circuit in communication with the antenna;
- and
- a strain gauge in connection with the integrated circuit,
- wherein the integrated circuit and strain gauge are positioned within the bore of the set screw,
- wherein the threaded portion of the break-off set screw is configured to fasten to an anchoring member supporting a longitudinal rod,
- wherein the strain gauge is configured to measure a localized force between the break-off set screw and the longitudinal rod when the break-off set screw contacts the longitudinal rod, and
- wherein an outer surface of the break-off head is aligned with an outer surface of the adjustment head.
Dependencies are inferred from the claim text.