Patent ID: 9119645
Filing Date: 2015-09-01
Classification: A61B

Abstract:
1. A pedicle drill guide for use in spinal surgery to position and cannulate a vertebral pedicle, the drill guide comprising: a stabilizing anchor pin for securing into a pedicle offset from a pedicle center positioned between the pedicle center and a lateral pedicle wall; a molded radiolucent one piece guide body not suitable for autoclave sterilization wherein the guide body near an inner tip end has a truncated conical shaped tip for insertion into a surgical opening above the spine of the patient and resting firmly on a facet joint just lateral of the pedicle center, the inner tip end has a plurality of spiked projections for contacting the surface of the pedicle, the guide body made of a plastic or radiolucent material which allows x-ray imaging to pass and is heat sensitive unsuitable for autoclave sterilization to insure one time use, extending longitudinally from an outer end to the inner tip end, the guide body having a center hole for receiving a stabilizing anchor pin, the center hole extending longitudinally through the outer end and inner tip end, and a plurality of satellite holes extending through the guide body from inner tip end and outer end parallel to the center hole, each satellite hole having an entry hole portion of a larger diameter than an exit hole portion sized to accommodate a K-wire being spaced from the center hole by a distinct predetermined distance (d) and sized to receive the K-wire, the K-wire when inserted in a satellite hole for placement into a pedicle being at the distance (d) from an axial center of the center hole in which the stabilizing anchor pin is received and positioned offset from the pedicle center, the guide body being rotatable about the stabilizing anchor pin to allow positioning and alignment of the satellite hole relative to the pedicle center; a target ring affixed to the guide body near the inner tip end for overlapping the center of the pedicle, the target ring being a radio-opaque material to provide in combination with the stabilizing anchor pin an ideal locating feature to position one of the satellite holes with the pedicle center when precisely place the K-wire to provide a pathway for a cannulated pedicle screw, the guide allowing simultaneous alignment of both AP and Lateral views for positioning the K-wire pathway; and wherein the stabilizing anchor pin has a diameter larger than the K-wire and a length longer than the guide body by a few mm configured to secure the anchor pin to the facet joint.