[Analysis of correlation between spinal nerve high tension and disc degeneration in 100 cases]

Objective: To explore the correlation between the spinal nerve high tension and lumbar disc degeneration, the pathogenesis of hanging intervertebral disc degeneration. Methods: From June 2016 to June , a retrospective analysis 2017 of 100 cases of lumbar spinal stenosis were included in Department of Spine Surgery, Changzheng Hospital, the Second Military Medical University. They were divided into experimental group (50 cases, nerve high tension group) and control group (50 cases, nervous tension in the normal group) according to preoperative lumbar MRI of cauda equina syndrome and settlement of intraoperative detecting nerve tension. The Pfirrmann grade was used to evaluate degree of lumbar (L3/4-L5/S1) disc degeneration.The correlation between spinal nerve tension and lumbar disc degeneration was analyzed, and the severity of experimental group and control group on lumbar disc degeneration was compared. Results: There was no significant difference in the age and sex ratio between the two groups (P>0.05). The Pfirrmann score of the experimental group was L3/4 (4.74±1.6) grade, L4/5 (5.32±1.33) grade, L5/S1 (5.54±1.13) grade; the control group Pfirrmann score was L3/4 (3.5±1.16) grade, L4/5 (4.12±0.9) grade, and L5/S1 (4.1±0.97) grade.The severity of intervertebral disc degeneration in experimental group was higher than that in control group, with statistical significance (P<0.05). There was a correlation between lumbar disc degeneration and nerve tension in L3/4, L4/5 and L5/S1, and the correlation trend was L5/S1> L4/5> L3/4. Conclusion: There is a correlation between lumbar disc degeneration and spinal nerve high tension.A new pathogenesis of hanging intervertebral disc degeneration that the degeneration of lumbar disc is a compensatory mechanism in order to alleviate the axial stretch injury is put forward.