The Short-term Clinical Efficacy Of The Internal Fixation System Coflex's Treatment On Degenerative Lumbar Spinal Stenosis

Objective:To evaluate the interspinous dynamic fixture Coflex's short-term clinical efficacy on degenerative lumbar spinal stenosis.Methods:Coflex was used in retrospective analysis of treatment of 20 patients(11 males and 9 females, aged 42 to 73 years, mean 61 years old) with degenerative lumbar spinal stenosis at the department of traumatology in the First Affiliated Hospital of Xinjiang Medical University from October 2008 to October 2010. Coflex devices were used at L3-4 spinous process or L4-5 spinous process or continuous L3-4, L4-5 spinous process between the two segments in the 20 cases of patients with degenerative lumbar spinal stenosis. All patients were followed up for 3 to 24 months, with an average follow-up time of 12 months. All patients were evaluated to observe postoperative function obstacle recovery and pain relief by the Japanese Orthopaedic Association low back pain scoring procedure (Japanese Orthopedic Association, JOA), Oswestry Disability Index score function (ODI) and Visual Analogue Scale (VAS) before surgery and postoperation.Results:Coflex fixation system was used to treat the patient with degenerative lumbar spinal stenosis. Postoperative lumbocrural pain recovered well, the obvious postoperative complications were not seen.JOA score (8.55±2.328) before surgery increased to postoperation (26.40±1.635) points, ODI score (83.88±4.673)%before surgery reduced to postoperation (46.65±4.582)%points, VAS score (8.05±0.999) before surgery reduced to postoperation (3.75±0.910) points. During follow-up, JOA, VAS and ODI scores between postoperation and preoperation have significant statistic difference (P<0.01).Conclusion:The short-term clinical efficacy of Coflex fixation system which aims to treat degenerative lumbar spinal stenosis is satisfying, but long-term effects need further observation.