US 12,133,666 B2
Reducer for stabilization member in spinal surgery
Douglas Brooke, Golden, CO (US); Heidi Farmer, Superior, CO (US); Guillaume Quetier, Lakewood, CO (US); James Vincent Eaton, Denver, CO (US); and Larry T. Khoo, Studio City, CA (US)
Assigned to Zimmer Biomet Spine, Inc., Westminster, CO (US)
Filed by Zimmer Biomet Spine, Inc., Westminster, CO (US)
Filed on Aug. 12, 2022, as Appl. No. 17/886,851.
Claims priority of provisional application 63/233,050, filed on Aug. 13, 2021.
Prior Publication US 2023/0052647 A1, Feb. 16, 2023
Int. Cl. A61B 17/70 (2006.01)
CPC A61B 17/7086 (2013.01) [A61B 17/708 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A reducer for a pedicle screw extender, the reducer comprising:
a reducing shaft for engaging a stabilization member, the reducing shaft comprising a threaded proximal end;
a reducer body for engaging the pedicle screw extender and slidably engaged with the reducing shaft along an axis;
a clutch mechanism mounted to the reducer body, the clutch mechanism comprising:
a clutch housing comprising:
an annular body;
a central passage extending through the annular body into which the threaded proximal end of the reducing shaft is configured to extend; and
a port extending into the annular body to intersect the central passage;
a clutch knob surrounding the annular body; and
a clutch pawl disposed within the port;
wherein rotation of the clutch knob is configured to push the clutch pawl into engagement with the threaded proximal end, and
wherein the clutch knob comprises an inner track including a ramp configured to engage the clutch pawl, the ramp including a curved face having a varying distance to the axis.