最简单的解释是腰麻时硬膜外针未在硬膜外间隙。
The simplest explanation is that the epidural needle is not actually in the epidural space at the time of attempted spinal puncture.
游离的髓核移位至后方硬膜外间隙是非常少见的。
Epidural migration of a sequestrated disc to posterior epidural space is rare.
结果：腰骶部脊神经根在硬膜外间隙长度短，且显露困难。
Results: The length of lumbosacral nerve roots in epidural space is short and extremely difficult to be exposed.
目的探讨硬膜外间隙持续注药治疗颈椎间盘突出症的效果。
Objective To study the effect of treating prolapse of cervical intervertebral disc with continuous drug injection.
结论颈部硬膜外间隙持续注药，治疗颈椎间盘突出症疗效确切，优于单次注药。
Conclusion The treatment of prolapse of cervical intervertebral disc with continuous drug injection is reliable compared with single drug injection method.
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.
目的：探究腰骶部脊神经根在硬膜外间隙的解剖情况，为临床SPR手术提供解剖学依据。
Objective:To investigate the anatomical features of lumbosacral nerve roots in epidural space to provide the anatomical basis for selective posterior rhizotomy (SPR).
经工作套管放置内镜(它带有手术光源和小摄像机)，允许外科医生通过视频屏幕观察纤维环、椎间盘、硬膜外间隙。
An endoscope (which contains a surgical light and small camera) is placed through the tube, allowing the surgeon to view the annulus, disc, and epidural space on a video monitor.
经工作套管放置内镜(它带有手术光源和小摄像机)，允许外科医生通过视频屏幕观察纤维环、椎间盘、硬膜外间隙。
An endoscope (which contains a surgical light and small camera) is placed through the tube, allowing the surgeon to view the annulus, disc, and epidural space on a video monitor.
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