Results:Damages to dura mater spinalis,mainly caus ed by laminectomy rongeur (64%) and adhesion dissecting (28%),occurred in 25 out of 1100 cases (account for 2.3%).

• 结果：1100例手术中并发硬脊膜损伤的有25例，占2.；35%25。损伤的原因有椎板钳伤(64%25)，松解粘连时撕裂(28%25)等。