Microscope-assisted Microdecompression For Degenerative Lumbar Spinal Canal Stenosis

Objective To evaluate the characteristics and efficacy of microscope assistedminimally invasive decompression for degenerative lumbar spinal canal stenosis.Method From May2009to May2010, we assembled the data of35patientswith degenerative lumbar canal spinal stenosis were treated with microscope assistedminimally invasive decompression, and analyzed the operating effects. Including20males and15females，the mean age were62.5years （range in55－70years）．Thecourse of disease was from2to15years with an average of6years．Single segmenthad20cases (L_3-4,3cases; L_4-5,10cases; L₅-S₁,7cases)and double segments had15cases (L_3-5,7cases; L₄-S₁,8cases)． The clinical effects were evaluated andimprovement rate was calculated according to JOA scoring before and afteroperation．Results The mean JOA scoring was significantly statistic difference betweenbefore and after operation（P＜0.05）．The clinical effects were evaluated according toJOA scoring，excellent in20cases，good in13，medium in2, poor in0，the rate ofexcellent and good was94.2％，the mean improve rate was83%．All the patients werefollowed up with an average of19months （range in6－30months）. There was norecurrent case during the whole follow-up．Conclusion Microscope assisted minimally invasive decompression fordegenerative lumbar spinal canal stenosis can obtain satisfactory therapeutic effect，which had advantages of less trauma，fast restoration， little influence on the spinalstability．...