1 case was invalid, and there was no complications occurred, Conclusion Percutaneous collagenase chemonucleolysis in CT position was a convenient, safe, efficient and minimal invasive technique.

• 结论CT引导下经皮硬膜外靶位注射胶原酶治疗腰椎间盘脱出是一种操作准确、创伤小、安全有效的介入治疗方法。