1. If no clinical effect is achieved after expectant treatment and extra-spinal diseases were excluded, exploratory operation inside canalis spinal should be employed.
   经保守治疗后无效及排除其它椎管外疾患后，行椎管内探查手术治疗。

声明：以上例句、词性分类均由互联网资源自动生成，未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。