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1·Thecal sac cross-sectional area was calculated at each disc space.

计算每个椎间隙处的硬膜囊横断面积。

2·The thecal sac and nerve root are then gently retracted and protected with a nerve retractor.

使用神经牵引器轻柔的牵拉与保护硬膜囊与神经根。

3·Objective: To compare the effect of the rotary needle treatment and the crossed needle treatment of wrist thecal cysts.

目的：探讨旋针法(治疗组)与“十”字针法(对照组)治疗腕背囊肿疗效的观察。