[Treatment of lumbar intervertebral disc protrusion and remaining bulk ligamentum flava by micro-endoscope].

To investigate operative skill and recent clinical effects of remaining bulk ligamentum flava and treatment of lumbar intervertebral disc protrusion by micro-endoscope.Fifty-two cases with lumbar intervertebral disc protrusion included 31 males, 21 females; aged from 28 to 45 years,mean 36 years; L(4,5) in 24 cases, L5S1 in 28 cases. Under the micro-endoscope, all patient were excised the vertebral plate partly, decompressed the nerve root, remaining bulk ligament flava and excised the herniated nucleus pulposus.Forty-six of 52 patients were followed up for 5 to 51 months with an average of 34.5. According to the effect of Nakai standards,the results were excellent in 34 cases, good in 9 cases, fair in 3 cases. The operation time was 45 to 75 minutes and bleeding was 40 to 80 ml. There were no nerve root injury and endorachis tear complications.The bulk ligamentum flava remaining cure intervertebral disc protrusion by micro-endoscope, demic natural anatomic structure is retained through technically manipulate and spinalis constancy is kept.