Percutaneous instrumentation and surgical procedure
An instrument for assisting in guiding a spinal connector or rod through one or more spinal implants placed in the spine includes a main assembly having the ability to accurately guide a rod through the implants by way of rotation and translation. By introducing the rod via rotation, the tip of the rod can be located very accurately deep in soft tissue for percutaneous applications. Once inside the first implant, the rod tip can be advanced by translation and rotation to the next implant. The number of implants connected in this manner is only limited to the length and curvature of the rod introduced. However, an advantage to the instrument is the ability to handle multiple length rods of different curvatures by adjustments to the instrument.
1. A spinal implant device for inserting a curved spinal implant alignment rod through an opening of at least one spinal implant, comprising:
a curved rod holder:
defining a central bore shaped to slidably receive therein the curved spinal implant alignment rod and having a rod holding curve substantially equal to a curve of the curved spinal implant alignment rod; and
having outer bearing surfaces;
an elongated main body defining a post connector portion, a post receiving slot, and a rod holder slot and having a bearing assembly operable to hold the rod holder within the rod holder slot longitudinally and laterally stable and rotationally movable about a central rotation point of the rod holder that is aligned with the post connector portion, the bearing assembly having bearings providing at least three bearing contact points at the outer bearing surfaces to movably hold the rod holder with respect to the main body such that the rod holder can only arcuately rotate with respect to the central rotation point;
at least one spinal implant post having:
a distal implant retaining end operable to removably secure the at least one spinal implant thereto;
a proximal post securing end shaped to removably secure with the post connector portion; and
a height such that, when the proximal post securing end is removably secured at the post connector portion, the spinal implant is held at a distance to align the opening of the spinal implant with a tip of the rod in the rod holder when arcuate motion of the rod holder rotates the rod within the bearings to the spinal implant;
the post receiving slot being shaped to hold the proximal post securing end longitudinally free and laterally secure; and
the rod holder slot being shaped to hold therewithin the bearings and to movably hold the rod holder within the bearings, at least one of the bearings being longitudinally adjustable towards and away from the rod holder to removably hold the rod holder therewithin.
2. The spinal implant device according to claim 1 , wherein:
the rod is a set of rods having different curvatures;
the rod holder is a set of rod holders correspondingly curved to the set of rods;
the at least one spinal implant post is a plurality of posts each having a height such that, when the proximal post securing end is removably secured at the post connector portion, the spinal implant is held at a distance to align the opening of the spinal implant with the tip of the rod in the rod holder when arcuate motion of the rod holder rotates the rod rotated within the bearings to the spinal implant; and
the bearings being adjustable to provide different holding geometries for the rod holders.
3. The spinal implant device according to claim 1 , which further comprises a handle operable to rotate the rod holder within the main body, the handle having a handle end operable to stop rotation of the rod holder when the tip of the rod is in a defined location within the opening of the spinal implant.