The simplest explanation is that the epiduralneedle is not actually in the epidural space at the time of attempted spinal puncture.
最简单的解释是腰麻时硬膜外针未在硬膜外间隙。
2
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.
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。
3
Objective To evaluate the clinical effect of two different filling material on treating lacrimal canaliculi rupture:vein detain needle, epidural catheter.