THE THERAPEUTIC EFFECT AND RELATED FACTORS ANALYSIS OF CT-GUIDED SELECTIVE NERVE ROOT BLOCK IN LUMBAR INTERVERTEBRAL DISC HERNIATION

Objective: To observe the therapeutic effect and related factors of CT-guided selective nerve root block in lumbar intervertebral disc herniation.Methods: 32 patients with lumbar intervertebral disc herniation underwent CT-guided selective nerve root block procedure.Visual Analogue Scale(VAS) was used to evaluate pain relief.Therapeutic effects on the herniation segment,herniation location,herniation morphology and block segment retrospectively were also measured.Results: The mean VAS of pre-and postoperation was 7.38±1.13 and 2.06±2.00,respectively(P0.01).The therapeutic effect for lateral disc herniation was better than the central.Cases with mild herniation were better than the moderateones.For the central herniation group,the therapeutic effect of bi-segmental block is better than the single segment block.The differences were statistically significant(P0.05).No significant difference was found whether the herniation occured in different segments(P0.05).Conclusion: CT-guided selective nerve root block in lumbar intervertebral disc herniation is safe and effective.Pre-operative clarification of disc herniation details and choosing different block segments may improve treatment outcome.