Spinous process fixation plate and minimally invasive method for placement
AssigneeLatitude Holdings, LLC
InventorsKaveh Khajavi, David E. Lane
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Abstract
The invention is directed to a laterally inserted spinous process plating device and a method for installing the device using a minimally invasive procedure. The device includes a partially threaded bolt as well as a contralateral and ipsilateral fixation plates, a deployment nut, a lag nut and a locking nut. Each fixation plate includes a pair of wing portions that are pivotally connected to one another to facilitate installation. The each of the fixation plates includes anchoring elements.
Claims15
A spinous process fixation device comprising:
- a partially threaded bolt;
- a first fixation plate having a first wing portion and a second wing portion;
- a second fixation plate having a third wing portion and a fourth wing portion;
- a said first wing portion being pivotally connected to said second wing portion;
- said third wing portion being pivotally connected to said fourth wing portion;
- said first fixation and said second fixation plate being mounted on said partially threaded bolt;
- said first fixation plate being adapted to operatively engage a first surface of a spinous process bone and said second fixation plate being adapted to operatively engage a second surface on the spinous process bone which is located on the spinous process bone on a side opposite said first surface of said spinous process bone.
A method for surgically inserting an intraspinous fixation device comprising the steps of:
- placing a first fixation plate comprised of first and second winged portions that are pivotally located on a partially threaded bolt,
- pivoting the winged portions so that the first winged portion is substantially folded over the second winged portion;
- passing the substantially folded first fixation plate through an interspinous;
- threading a deployment nut onto said partially threaded bolt, said deployment nut including a surface in operative engagement with said first and second wing portions to cause said first and second wing portion to unfold and to be brought flush against the spinous process bone,
- deploying a second fixation plate having third a fourth wing portions down said partially threaded bolt, said second fixation plate being substantially folded but in a reverse orientation to said first fixation plate,
- threading a lag nut on to said partially threaded bolt, said lag nut having a surface in operative engagement with said second fixation plate to unfold said second fixation plate and secure said second fixation plate to the spinous process bone.
Dependencies are inferred from the claim text.