Simple pedicle screw placement navigator

Abstract

The present invention relates to a simple pedicle screw placement navigator. The simple pedicle screw placement navigator comprises a guide sleeve, a guide tube, a guide pin, a transverse link rod, a right-angle swing rod, a lifting bar and a sliding block; the guide tube is fixed by the guide sleeve; the guide pin is positioned in the guide tube; one side of the guide sleeve is provided with a protractor, and the protractor can slide on the transverse link rod in an arc direction to achieve a specific abduction angle; the other end of the transverse link rod is slidably connected with a transverse main body of the right-angle swing rod and capable of achieving left and right translation; the tail end of a longitudinal main body of the right-angle swing rod is connected with a dial at an upper end of the lifting bar, and the longitudinal main body can rotate around the center of the dial to achieve head inclination or tail inclination with a specific angle; and a lower end of the lifting bar is connected with a sliding bar through the sliding block, so that the whole device can translate on the sliding bar. Compared with the prior art, the abduction angle and the head inclination or tail inclination angle of pedicle screw placement can be rapidly quantified after a screw entering point is determined, compared with a screw placement technology by hand, precision can be largely increased, and the expensive and time-consuming disadvantages of a large-scale navigation device are also overcome.

Description

technical field [0001] The invention relates to a pedicle screw placement navigator used in spinal surgery, which belongs to medical equipment. Background technique [0002] Traditional spinal surgery often requires pedicle screws to be placed under an open incision. The most common method is the manual screw placement method, but the biggest disadvantage of this method is that the accuracy of screw placement is poor, and it is greatly dependent on the patient's position and the doctor's experience. relation. In order to improve the accuracy of screw placement, large-scale navigation systems for spinal surgery have been developed abroad. Although the accuracy of screw placement has been significantly improved, there are disadvantages such as bulky equipment, complicated operation, and high price. [0003] Chinese patent CN105125285A discloses a movable three-dimensional rocker arc-guided spinal puncture aid, which includes a ground movable support part, a three-dimensional ...

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However, the structure of the device is too ...

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