Imaging Evaluation Of Posterior Cervical Single-opening Spinal Canal Angioplasty For Multisegmental Cervical Spondylotic Myelopathy

ObjectiveThis study aims to analyze the changes of imaging parameters and the influencing factors of posterior cervical spinal canal angioplasty in the treatment of multisegment cervical spondylotic myelopathy.MethodsA follow-up study was performed on 21 patients who underwent posterior cervical spinal canal vertebroplasty for multisegment cervical spondylotic myelopathy at the orthopedic department of the First Affiliated Hospital of Bengbu Medical College from October 2017 to September 2019.To analyze the changes of imaging parameters of cervical spinal canal sagittal diameter and cervical spinal cord posterior movement before and after the operation.According to the patient’s different disease degree,course of disease,and ligament complication group comparison,analyze changes in imaging parameters and their influencing factors.Results: There were 21 patients with multisegment cervical spondylotic myelopathy,including 13 males and 8 females.The sagittal diameter enlargement rate of cervical spinal canal before operation was(9.538±0.595)mm,the sagittal diameter enlargement rate of cervical spinal canal after operation was(14.962 ± 1.682mm),and the average postoperative spinal cord displacement was 2.667 mm compared with that before operation,the analysis were statistically significant.Sagittal diameter enlargement rate of spinal canal in patients less than 6 months(0.666 ± 0.078 mm),Sagittal diameter enlargement rate of cases over 6 months(0.517 ± 0.070 mm),Backward distance of spinal cord in cases less than 6 months(3.309 ± 0.484 mm),thedistance of back spinal cord in cases with a disease course of more than 6 months(2.397 ± 0.456mm),both groups were statistically significant;Sagittal diameter enlargement rate for simple lesions(0.601 ± 0.096 mm),sagittal diameter enlargement rate for combined ligament lesions(0.480 ± 0.050 mm),backward movement distance of spinal cord for simple lesions(2.887 ± 0.606mm),and backward movement distance of spinal cord with ligament lesions(2.237 ±0.4554mm),the statistical analysis of the two groups was statistically significant.Conclusion1.Posterior cervical single-door spinal canal augmentation can effectively expand the spinal canal volume of multisegment cervical spondylotic myelopathy and move the spinal cord backward,improving nerve function;2.Patients with moderate-severe,long-term disease and post-combination longitudinal ossification of the ligament or(and)calcification of the yellow ligament with multisegment cervical spondylotic myelopathy are less likely to have posterior spinal cord movement and sagittal diameter enlargement than patients with mild,short-course and simple disease good.