TIGHTENING DEVICE FOR SPINE SURGERY

摘要

A device for spinal surgery that may be used for tightening a locking cap onto at least a portion of a pedicle screw. The device may include a torque-generating body having a proximal end and an opposing distal end and a drive shaft rotatably driven by the torque-generating body. A proximal end of the drive shaft may be operatively engaged to the distal end of the torque-generating body and an opposing distal end of the drive shaft may engage at least a portion of one of the locking cap and the pedicle screw. An anti-torque device is provided that has an elongated and generally hollow member defining a longitudinal axis. The member has a proximal end and an opposing distal end, where the proximal end of the anti-torque device may be fixed from rotating relative to at least a portion of the torque-generating body and the distal end may be fixed from rotating relative to a spine rod or a pedicle screw.

主权项

1. A system for tightening a locking cap onto at least a portion of a pedicle screw during spinal surgery, the system comprising:
a torque-generating body including an elongated shaft having a proximal end and an opposing distal end and defining a longitudinal axis extending therebetween, the distal end of the elongated shaft coupled to a handle; a drive shaft rotatably driven by the torque-generating body, the drive shaft having a proximal end, an opposing distal end and a longitudinal axis extending therebetween, the proximal end of the drive shaft being operatively engaged to the distal end of the torque-generating body such that the longitudinal axis of the torque-generating body extends in a direction away from a longitudinal axis of a drive shaft, the opposing distal end of the drive shaft engaging at least a portion of one of a locking cap and the pedicle screw; and an anti-torque device comprised of an elongated and generally hollow member defining a longitudinal axis, the member having a proximal end and an opposing distal end, the proximal end of the anti-torque device being fixed from rotating relative to at least a portion of the torque-generating body, wherein the drive shaft is operatively engaged with the torque-generating body such that rotational movement of the elongated shaft about the longitudinal axis of the torque-generating body translates into rotational movement of the drive shaft about the longitudinal axis of the drive shaft.