The simplest explanation is that the epidural needle 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。
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。
Objective To evaluate the clinical effect of two different filling material on treating lacrimal canaliculi rupture:vein detain needle, epidural catheter.
目的比较静脉留置针与硬膜外导管应用于泪小管断裂吻合术中的临床疗效。
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