Actuated simultaneous segmental reduction
AssigneeGlobus Medical, Inc.
InventorsDavid Leff, Matthew Darnall
Life of this patent
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Abstract
Reducer instruments, systems, and methods thereof for reducing a spinal rod. A series of reducers attachable to respective bone fasteners may be actuated by pneumatic or electronic control. Each reducer may have a reducer body having a pair of arms separated by a longitudinal slot configured to receive the spinal rod. A pusher may be slidably engaged with the arms with a distally extending tip configured to translate the spinal rod along the slot. The reducer may include a housing having a cylindrical body with a moveable component configured to drive the pusher to apply a compressive load to the spinal rod. For example, the moveable component may be piston or threaded rod configured to translate the pusher, and thereby drive the spinal rod into alignment.
Claims20
A system for reducing a spinal rod comprising:
- a plurality of reducers configured to be actuated by hydraulic or electronic control,
- each reducer having a reducer body and a housing coupled to the reducer body,
- the reducer body having a pair of arms separated by a longitudinal slot configured to receive the spinal rod, a pusher slidably engaged with the arms and having a distally extending tip configured to translate the spinal rod along the slot, and
- the housing having a cylindrical body with a moveable component configured to drive the pusher to apply a compressive load to the spinal rod.
An actuated reducer for reducing a spinal rod comprising:
- a pneumatic cylinder attached to a reducer body along a central tool axis,
- the reducer body having a pair of arms separated by a longitudinal slot configured to receive the spinal rod, a pusher slidably engaged with the arms and having a distally extending tip configured to translate the spinal rod along the slot, and
- the pneumatic cylinder defines a chamber and receives a piston therethrough, wherein when compressed air is supplied to the chamber, the piston translates the pusher along the central tool axis to drive the spinal rod.
A method of correcting a spinal deformity, the method comprising:
- anchoring a bone fastener in a vertebra, the bone fastener having a tulip head attached to a screw;
- attaching a reducer to the tulip head of the bone fastener, the reducer including a reducer body having a pair of arms separated by a longitudinal slot, a pusher slidably engaged with the arms and having a distally extending tip;
- positioning a spinal rod through the slot in the reducer body;
- and
- actuating the reducer via pneumatic or electronic control to move the pusher distally to translate the spinal rod along the slot and into the tulip head of the bone fastener.
Dependencies are inferred from the claim text.