Screw Tower and Rod Reduction Tool
AssigneeGlobus Medical, Inc.
InventorsMatthew Bechtel, Caelan Allen, Neil R. Crawford, Thomas Calloway, Steven Chang, Norbert Johnson, Jeffrey Forsyth
Life of this patent
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Abstract
A system includes a screw tower, an instrument, and a housing. The instrument includes a driver shaft extendable longitudinally through the screw tower, and a threaded sleeve mounted on a proximal portion of the driver shaft. The housing includes one or more retention members coupleable to the screw tower, and a threaded button threadably coupleable to the threaded sleeve. The threaded sleeve is rotatable about a longitudinal axis to urge the driver shaft longitudinally relative to the screw tower.
Claims20
A tracking system for tracking bone screw towers attached to vertebral bodies during a minimally invasive surgical procedure, the system comprising:
- a first screw tower adapted to be attached to a pedicle screw attached to a vertebral body of a patient, the first screw tower having a plurality of spaced stripes in a selected pattern;
- a second screw tower having a plurality of spaced stripes adapted to be attached to a second pedicle screw;
- a processor;
- and
- a plurality of position sensors in communication with the processor and including a plurality of stereo-photogrammetric cameras;
- wherein the processor is configured to distinguish between the first screw tower and the second screw tower based on the spaced stripes of the first screw tower and the second screw tower.
A tracking system for tracking bone screw towers attached to vertebral bodies during a minimally invasive surgical procedure, the system comprising:
- a first screw tower adapted to be attached to a pedicle screw attached to a vertebral body of a patient, the first screw tower having a cylindrical body and a plurality of spaced stripes in a selected pattern on the cylindrical body, the cylindrical body having a pair of longitudinal recess for receiving a rod to be fixed to the pedicle screw;
- a second screw tower having a plurality of spaced stripes adapted to be attached to a second pedicle screw;
- a processor;
- and
- a plurality of position sensors in communication with the processor and including a plurality of stereo-photogrammetric cameras;
- wherein the processor is configured to determine a center of the spaced stripes on the first screw tower from camera images obtained from the stereo-photogrammetric cameras based on a stereo-photogrammetry process,
- wherein the processor is configured to distinguish between the first screw tower and the second screw tower based on the spaced stripes of the first screw tower and the second screw tower.
Dependencies are inferred from the claim text.