腰椎间盘突出术后原位间隙再脱出

目的 探讨术后原位复发性腰椎间盘突出症的发生机理。影像学特征和治疗方法。方法 12例病人均行再次手术治疗，采用原切口显露椎板残端进入椎管并将神经根通道做适当扩大，摘除髓核并对狭窄的神经根管进行减压，没有切除瘢痕组织。结果 本组10例经平均4.6年随访，优6例。良2例。可2例。优良率为80%。结论 椎间盘术后原位复发的主要原因是髓核遗留过多，影像学检查上MRI较CT更能清晰显示髓核突出的范围及大小，原位切口显露法摘除髓核可有效地去除病因，损伤小疗效满意，并对脊柱稳定性有利。

Surgical treatment for revision of lumbar disc herniation

Objective:To study the pathological charge and the clinical characteristics of image of recurrent lumbar disc hemiation Methods:12 cases of the recurrent lumbar disc herination were treated with surgery. The spinal cannal was entered through the primary site of expose the nerve root orifices were enlarged and the residual of the nucleus pulposus was resected and the adhesions of nerve roots released. Results:The follow-up period lasted in average of 4.6 years in all cases. 6 cases got excellent result,2 cases good and 2 fair. Conclusion:The principal cause of recurrence was too much residual of nucleus pulposus. MRI had superiority to the other imaging methods; during re-operation the denatured protrusion of the intervertebal disc tissues must be excised completely and the nerve root cannal stenosis totally released.