Patent ID: 9649140
Date: 2017-05-16
CPC Classifications: A61B

Claim:
1. A rod reduction instrument adapted for use with a spinal fixation system, the spinal fixation system including at least one spinal rod configured to span the distance between at least two vertebrae, at least two bone anchors each having a threaded anchor element, a housing configured to receive the spinal rod therein, and a lock screw adapted to mate with the housing to secure the spinal rod therein, and at least one guide assembly attachable to the bone anchor and configured to guide the spinal rod into the housing, the rod reduction instrument comprising: (a) a guide connector having (b) a tubular shaft having a lumen passing therethrough and exterior threads, a proximal end of the tubular shaft including a reduction knob for imparting rotation to the tubular shaft, and a distal end of the tubular shaft being coupled to the connector body such that the connector body and tubular shaft are fixed longitudinally relative to each other but freely rotatable relative to each other, and (c) a reduction tube having an internally threaded proximal segment threadedly engaged with the exterior threads of the tubular shaft, an enlarged middle segment accommodating the connector and dimensioned to permit the reduction tube to translate relative to the connector upon rotation of the tubular shaft, and a distal segment dimensioned to slidably receive the guide assembly therein and advance the spinal rod to the anchor housing attached to the guide assembly when the reduction tube translated distally relative to the connector, the distal segment having a distal end configured to contact the spinal rod.