Document Detail

Nerve root pressure in lumbar disc herniation.
MedLine Citation:
PMID:  10528375     Owner:  NLM     Status:  MEDLINE    
STUDY DESIGN: The contact pressure between the nerve root and lumbar disc herniation was measured and compared with clinical features. OBJECTIVE: To assess levels of actual compression to the nerve root in clinical cases. SUMMARY OF BACKGROUND DATA: Actual levels of pressure to the nerve root of lumbar disc herniation in clinical cases is unknown. METHODS: The study was performed on 34 patients who had lumbar disc herniation. All of them had been treated by open discectomy. After laminotomy, nerve root pressure was measured by inserting a transducer between the nerve root and the disc herniation. The magnitude of pressure was compared with clinical features. RESULTS: Nerve root pressures before discectomy were varied from 7 mm Hg to 256 mm Hg (mean, 53 mm Hg). After discectomy, the contact pressure was 0 mm Hg in all cases. There were no significant correlations between the magnitude of nerve root pressure and limits to the degree of straight leg raising, duration of symptoms, and age of the patients. However, the magnitude of the pressure in patients with neurologic deficits and trunk list was significantly higher than in the absence of these findings. CONCLUSIONS: The contact pressure exerted by lumbar disc herniation on the nerve roots was recorded during surgical intervention, and the mean pressure was 53 mm Hg. The magnitude of nerve root pressure was not correlated with the degree of straight leg raising, but with the severity of neurologic deficits.
K Takahashi; I Shima; R W Porter
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Spine     Volume:  24     ISSN:  0362-2436     ISO Abbreviation:  Spine     Publication Date:  1999 Oct 
Date Detail:
Created Date:  1999-11-04     Completed Date:  1999-11-04     Revised Date:  2009-07-09    
Medline Journal Info:
Nlm Unique ID:  7610646     Medline TA:  Spine (Phila Pa 1976)     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2003-6     Citation Subset:  IM    
Department of Orthopaedic Surgery, Saitama Medical School, Japan.
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MeSH Terms
Age Distribution
Intervertebral Disk / pathology,  physiopathology*,  surgery
Intervertebral Disk Displacement / pathology,  physiopathology*,  surgery
Leg / physiology
Lumbar Vertebrae / pathology,  physiopathology*,  surgery
Middle Aged
Nervous System Diseases / pathology,  physiopathology
Pain Measurement
Prospective Studies
Sciatica / physiopathology
Spinal Cord Compression / pathology,  physiopathology*
Spinal Nerve Roots / pathology,  physiopathology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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