Instrument and method for spinal compression and distraction

摘要

An orthopedic instrument for compression and distraction of bone segments includes a first receiver, a second receiver, a positioner member, and a guide member. The first receiver includes a first receiver aperture that receives a first screw extender. The second receiver includes a second extender aperture that receives a second screw extender. The positioner member translates the second receiver relative to the first receiver to apply one of a compression and a distraction force on the screw extenders. The guide member parallel to the positioner member guides the second receiver relative to the first receiver.

主权项

1. An instrument for compression and distraction of vertebrae using screw extenders, comprising:
a first receiver including
a fixed portion with a first positioner aperture and a first guide aperture; anda rotatable portion with a first receiver aperture for attachment to a first screw extender; a second receiver including a second positioner aperture, a second guide aperture, and a second receiver aperture for attachment to a second extender; a positioner member that translates one of the first and second receivers relative to the other of the first and second receivers; a guide member that guides the translation of the one of the first and second receivers relative to the other of the first and second receivers; and a lock member that disengages the rotatable portion from the fixed portion in the rotatable configuration and engages the rotatable portion with the fixed portion in the fixed configuration, wherein the lock member includes a lock shaft extending through a first lock aperture of the fixed portion and pivotally couples with a lever arm at a first end and a lock cap at a second end within a second lock aperture of the rotatable portion.