Morphometric analysis of the working zone for endoscopic lumbar discectomy

Jun-Hong Min; Shin-Hyuk Kang; Jang-Bo Lee; Tai-Hyoung Cho; Jung-Keun Suh; Im-Joo Rhyu

doi:10.1097/01.bsd.0000159034.97246.4f

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Journal article

Morphometric analysis of the working zone for endoscopic lumbar discectomy

Jun-Hong Min, Shin-Hyuk Kang, Jang-Bo Lee, Tai-Hyoung Cho, Jung-Keun Suh and Im-Joo Rhyu

Journal of spinal disorders & techniques, Vol.18(2), pp.132-135

04/2005

DOI: 10.1097/01.bsd.0000159034.97246.4f

PMID: 15800429

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Abstract

Our study's purpose was to analyze the working zone for the current practice of endoscopic discectomy at the lateral exit zone of the intervertebral foramen (IVF) and to define a safe point for clinical practice. One hundred eighty-six nerve roots of the lumbar IVFs of cadaveric spines were studied. Upon lateral inspection, we measured the distance from the nerve root to the most dorsolateral margin of the disc and to the lateral edge of the superior articular process of the vertebra below at the plane of the superior endplate of the vertebra below. The angle between the root and the plane of the disc was also measured. The results showed that the mean distance from the nerve root to the most dorsolateral margin of the disc was 3.4 +/- 2.7 mm (range 0.0-10.8 mm), the mean distance from the nerve root to the lateral edge of the superior articular process of the vertebra below was 11.6 +/- 4.6 mm (range 4.1-24.3 mm), and the mean angle between the nerve root and the plane of the disc was 79.1 degrees +/- 7.6 degrees (range 56.0-90.0 degrees ). The values of the base of the working zone have a wide distribution. Blind puncture of annulus by the working cannula or obturator may be dangerous. The safer procedure would be the direct viewing of the annulus by endoscopy before annulotomy; the working cannula should be inserted into the foramen as close as possible to the facet joint.

Adolescent

Adult

Aged

Aged, 80 and over

Body Weights and Measures

Diskectomy, Percutaneous - methods

Diskectomy, Percutaneous - standards

Endoscopy - methods

Endoscopy - standards

Female

Humans

Intervertebral Disc - anatomy & histology

Intervertebral Disc - pathology

Intervertebral Disc - surgery

Intraoperative Complications - etiology

Intraoperative Complications - prevention & control

Lumbar Vertebrae - anatomy & histology

Lumbar Vertebrae - pathology

Lumbar Vertebrae - surgery

Male

Medical Illustration

Middle Aged

Spinal Nerve Roots - anatomy & histology

Spinal Nerve Roots - surgery

Zygapophyseal Joint - anatomy & histology

Zygapophyseal Joint - surgery

Details

Title: Subtitle: Morphometric analysis of the working zone for endoscopic lumbar discectomy
Creators: Jun-Hong Min - Korea University
Shin-Hyuk Kang
Jang-Bo Lee
Tai-Hyoung Cho
Jung-Keun Suh
Im-Joo Rhyu
Resource Type: Journal article
Publication Details: Journal of spinal disorders & techniques, Vol.18(2), pp.132-135
DOI: 10.1097/01.bsd.0000159034.97246.4f
PMID: 15800429
ISSN: 1536-0652
eISSN: 1539-2465
Language: English
Date published: 04/2005
Academic Unit: Neurosurgery
Record Identifier: 9984460339402771

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