Therapeutic Analysis Of Laminoplasty By Expanding Vertebral Canal Through Posterior Approach In Treating Cervical Spinal Cord Injury Without Fracture And Dislocation

Objective： To observe the efficacy of laminoplasty by expandingvertebral canal through posterior approach in treating cervical spinal cordinjury without fracture and dislocationMethods： The laminoplasty by expanding vertebral canal throughposterior approach was used to treat23patients with cervical spinal cordinjury without fracture and dislocation from June,2010to June,2012in theFirst Affiliated Hospital of Dalian Medical University, including16malesand7female, age36-61years, mean age48.6years. Cause of injury:traffic accident in7cases, falling from height in6cases, falls5cases, thebruise3cases, sports injuries2cases.23patients before injury had noobvious nervous system disorder,12patients had numbness, weakness orinflexible mild neurological symptoms a few years ago. Check on admission,20patients complained neck pain and discomfort, limited mobility afterinjury, all patients had varying degrees of paresthesia and dyskinesia inlimbs. X-ray film and CT scans revealed neither fracture nor subluxation.Ossification of posterior longitudinal ligament8cases, hypertrophicligamentum flavum5cases, developmental spinal stenosis8cases.23casesall received laminoplasty by expanding vertebral canal through posteriorapproach.11cases received operation in1week,6cases in1month,5casesin40th day,2cases after2months. The myeloid function was evaluated byAmerican Spinal Injury Association (ASIA) grade. Results: All patients were followed up from1to18months, theaveraged period was12months. No reclosed was expanded with spinal corddecompression. The myeloid function recovered at different extents in allcases except for4that had no improvement because of the damage tooheavy or the injury time too long. ASIA grade: A grade1cases, B grade8cases, C grade3cases before operation. A grade1cases, C grade5cases, Dgrade5cases, E grade1cases after operation.Conclusions: Once the final diagnosis of cervical spinal cord injurywithout fracture and dislocation is verified, laminoplasty by expandingvertebral canal through posterior approach is an effective method to curecervical spinal cord injury without fracture or dislocation.