Clinical Efficacy Of Treatment Of Lumbar Spinal Stenosis By Modified TLIF

Objective: To retrospectively investigate the clinical outcomes of modified transfroaminal lumbar interbody fusion(TLIF), posterior lumbar interbody fusion(PLIF) for treatment of lumbar spinal stenosis(LSS).Method: 50 modified TLIF treated patients and 50 PLIF treated patients inhopitalized between Oct. 2013 and Jul. 2014 were restrospectively analyzed.The operation time, the amount of operation blood loss and the rate of complications were recorded. All patients were followed up for obtaining the VAS score and JOA score of pre-operation and last visit, respectively. In reference to Roberts grades, intervertebral height of pre-operation and post-operatio were assessed. The status of interbody fusion was judged by Suk criteria.Results: The operation time, the amount of operation blood loss were written in Table-1. The operation time and blood loss of PLIF group were more than that of modified TLIF group(p<0.05). Dural avulsion were seen in 4 case, 3of 4 were in the PLIF group, and the remaining 1 case was in modified TLIF group. These complications were fixed during the surgery,and no CSF leakage occurred after surgery. All patients were followed up for 6-24 months, 15.6months on average. Between the two groups, the VAS score and JOA score ofpre-operation and last visit were not significantly different(P>0.05);within each group, the VAS score and JOA score were improved significantly after surgery(P<0.05); improvement on grading of each group was not significantly different(P>0.05). Intervertebral heights of patients were increased in each group.Conclusion: Both the two surgical methods can effectively treat LSS.Modified TLIF can reserve most of the post-lumbar structures and minimize the occurrence of complications. PLIF is more effective in lowering the spinal pressure. Since the two method can be used to treat LSS, the surgical indications should be strictly sticked to.