首先，注射部位表面的皮肤作局部麻醉。使用用X线，引导穿刺针进入硬膜外间隙。

First, a local anesthetic is used to numb the skin above the injection site. Using X-rays, the needle is guided into the epidural space.

youdao

首先，注射部位表面的皮肤作局部麻醉。使用用X线，引导穿刺针进入硬膜外间隙。

First, a local anesthetic is used to numb the skin above the injection site. Using X-rays, the needle is guided into the epidural space.

youdao