Mri Findings And Clinical Symptoms Before And After The Csm Anterior Surgery Controlled Study

Objective To compare MRI performance and the JOA score results before and after the Anterior cervical surgery treating cervical spondylotic myelopathyand to analyse cervical spinal cord imaging and clinical efficacy of relevance.Methods Retrospectively analysing 59 patients'clinical data who had the anterior cervical surgery for CSM, the JOA score was made respectively before and after surgery, and postoperative improvement rate is calculated. MRI images were collected before and after surgery, and measured the following index on them: (1) the degree of spinal cord compression; according to the radius vector of the dural sac and spinal cord closure rate by reducing the degree of spinal cord compression,measured the width of the dural sac and spinal cord sagittal diameter in axial of MRI.(2) compensatory space occupied rate; With a digital image, graphics, the ratio is equal to the pixel area ratio. According to this principle, by calculating the ratio of pixel can be calculated: compensation gap between the disk occupation ratio = area / (area of the spinal canal - the spinal cord area). (3) MRI T2WI signal change; On the sagittal MRI of intramedullary high-signal areas were measured signal value and area, provided changes in the intensity and area within±10% as no change, as less than -10% of more than +10% of the treated Increased. (4) stability of cervical spine. The relationship was analysed Statistically among cervical spinal cord MRI and clinical symptoms before and after surgical treatment and of the recent performance.Results (1) The JOA score of pre-operative degree of the corresponding spinal cord compression on MRI axial display has no significant difference (P> 0.05), after 3 months, different levels of the corresponding degree of spinal cord compression there is no significant difference in JOA score (P> 0.05). (2) The JOA score before and after surgery in the severe group, moderate, mild compensation gap between the two groups has significantly different occupation rates (P <0.05), and the severe group was significantly higher than the compensatory space occupied mild group . Clearance rate of compensation on postoperative improvement rate of occupation has greater impact in this case study and has statistically significant. (3) 3 months after surgery, the groups of MRI T2WI signal intensity decreased, unchanged and increased rate of improvement have no significant differences (P> 0.05); area decreased, unchanged and expansion of three The postoperative improvement rate haven't any two significant differences (P> 0.05). (4) group before and after surgery of cervical stability and instability group and the JOA score were statistically significant (P <0.05). Stable group of postoperative improvement rate in the unstable group was significantly different between the two groups.Conclusion There was no relationship between spinal cord compression degree shown on axial MRI and clinical symptoms,Anterior cervical spinal cord before and after surgery. Axial clearance compensation calculated on the occupation rate can reflect the severity of clinical symptoms and has great influence on postoperative improvement rate. Associated with intramedullary cervical spinal cord MRI T2WI high signal, after surgical treatment by anterior still get better clinical results, 3 months after intramedullary high signal intensity and area may have changed, but patients After the improvement rate was not significantly correlated. The stability of the cervical spine and clinical symptoms have some relationship to improve the stability group of patients was higher than unstable groups.