AIM:To observe and compare the effects and characters of chemonucleolysis(CNL) and percutaneous laser disc decompression(PLDD) for treating lumbar disc herniation.

• 目的:观察比较经皮激光椎间盘减压术(percutaneouslaserdisedecom-pression,PLDD)与胶原酶溶核术(chemonucleolysis,CNL)治疗腰椎间盘突出症的疗效及特点。