采用慢性泛影葡胺胶囊逐级压迫建立慢性脊髓压迫动物模型，造成家兔第2腰髓节段的慢性压迫。
The membranous sac filled with urografin was applied to produce an animal model of chronic spinal cord compression (L 2).
目的：运用TNF作用的非凡标准来研究背根神经节表明受髓核压迫而导致的组织反应特性。
Objective. To study the characteristic tissue reaction at the surface of the DRG exposed to nucleus pulposus with special reference to the role of TNF.
双节段3例则采用前路腹膜外入路，L 4, 5进行人工椎间盘置换术，L5S 1行单枚人工髓核植入。
In double lesion, anterior extraperitoneal approach in 3 cases, L4, 5 received intervertebral disk replacement and L5S1 received single PDN replacement.
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