To Investigate The Change Of Paravertebral Muscle Cross Sectional Area In Patients With Degenerative Lumbar Spinal Stenosis And Its Clinical Significance

Objective:To investigate the change of paravertebral muscle cross sectional area in patients with degenerative lumbar spinal stenosis and analyze its clinical significance.Method:102 patients (50males and 52 females) with mean age of 55.56±9.54 and with lumbar spinal stenosis were treated in our hospital from September 2012 to February 2014.102 healthy persons (49 males and 53 females) with mean age of 53.48±6.45 were reviewed as control. Both groups showed no age and gender related difference (p>0.05) The CSA of the bilateral paravertebal muscles, including multifidus muscle、psoas major and erector spinae, at the L3-L5 levels were measured using T2-weighted axial MRI and Image J2x software. Using t test analyzed the difference of paravertebral muscle cross sectional area and the ratio of erector spinae CSA and multifidus muscle CSA between two groups. Result:DLSS group comparing with control group showing that its bilateral psoas major and erector spinae and the right of multifidus muscle CSA reduced in the aspect of L5,the right of erector spinae CSA in the aspect of L4. reduced. The right multifidus muscle CSA reduced in the aspect of L4 for DLSS; The right erector spinae, CSA reduced in the aspect of L3 and L4 for DLSS. The ratio of erector spinae CSA and multifidus muscle CSA of DLSS group reduced in the aspect of Ls.Conclusion:The CSA of multifidus muscle、psoas major and erector spinae in patients with DLSS reduced. But it is not ascertain the causal relationship between DLSS and paravertebral muscle atrophy For the moment, more systematic research is needed for the change of paravertebral muscle in DLSS patients.