Résumé
[Objective]To investigate the effect of treating degenerative spondylolisthesis by transforaminal lumbar interbody fusion with microendoscopic surgery.[Method]From January 2005 to December 2005,17 cases who underwent transforaminal lumbar interbody fusion with a pedicle screw system by microendoscopic surgery were analyzed retrospectively.The index diagnosis was degenerative lumbar spondylolisthesis with herniated nucleus pulposus in 11 cases,and with spinal canal stenosis in 5 cases.There were 10 male and 7 female,average age was 47.6(ranged,35～68)years.According to Meyerding grading system,roentgengram showed that there were 10 cases of grade Ⅰ?,7 cases of grade Ⅱ?,11 cases of L_4 and 6 L_5.[Result]Seventeen cases were reviewed after surgery.The postoperative follow-up ranged from 12 months to 24 months(averaged 16.2 months).Operative time averaged 160 minutes.Estimated blood loss averaged 120 ml.Mean length of hospital stay was 8 days.There were no nerve injury occurred during operation.No cases converted to open operation.In complications,one case suffered from intervertebral infection.Outcomes were quantified using Oswestry Disability Index.The average Oswestry score decreased from 48.3% preoperatively to 16.5% at 3 month and 14.0% at 6 month postoperatively.The rate of excellent and good was 97.5%.At last follow-up,all patients had solid fusions by radiographic criteria.[Conclusion]Transforaminal lumbar interbody fusion for lumbar vertebral degenerative spondylolisthesis by microendoscopic surgery has the advantages of shorter skin incision,less tissue damage,less blood loss and quicker postoperative recovery.