The Effect of lumbar lordosis on the distance between preemptive nail position of lumbar pedicle screw and prevertebral large vessels

Objective: To study the effect of lumbar lordosis on the distance between preemptive nail position of lumbar pedicle screw and anterior large vessels In imaging. Methods: With the lumbar intervertebral disc plain CT scan data of 107 healthy human subjects, we had measured the lumbar lordosis angle, the distance between preemptive nail position of lumbar pedicle screw and anterior large vessels of each patient, and statistical analysis was performed by SPSS (v25.0). Results: 1. No correlation was found between lumbar lordosis and the distance between preemptive nail position of lumbar pedicle screw and anterior large vessels in healthy people, but there was a weak positive correlation between lumbar lordosis and age. 2. In healthy people, the distance between L1-2 right preemptive nail position of lumbar pedicle screw and anterior large vessel was larger than that on left side, while the distance between L3-5 right preemptive nail position of lumbar pedicle screw was smaller than that on left side. Conclusion: lumbar lordosis does not affect the distance between preemptive nail position of lumbar pedicle screw and anterior large vessels. Placing pedicle screw on the right side of L1-2 is more safe than placing it on the left side, and placing pedicle screw on the left side of L3-5 is more safe than on the right side.