Document Detail

Epidural pressure measurements. Relationship between epidural pressure and posture in patients with lumbar spinal stenosis.
MedLine Citation:
PMID:  7604339     Owner:  NLM     Status:  MEDLINE    
STUDY DESIGN: The relationship between epidural pressure and lumbar posture was assessed in patients with lumbar spinal stenosis. OBJECTIVES: This study was performed to assess the relationship between epidural pressure and lumbar posture in patients with lumbar spinal stenosis. METHODS: The study was performed on 10 patients who had cauda equina symptoms at the L4-L5 level. The catheter transducer was inserted into the epidural space through L5-S1 interlaminar space and placed at the L4-L5 disc level. This transducer was connected with an amplifier and a recorder. Epidural pressure was continuously measured in various postures. RESULTS: Local epidural pressure at the stenotic level was low in lying and sitting postures, and high in standing postures. Pressure was increased with extension, but decreased with flexion. The highest pressure was 116.7 +/- 38.4 mm Hg in standing with extension. CONCLUSION: Epidural pressure was significantly related to posture. These pressure changes correlated with the development of cauda equina symptoms. The increase of epidural pressure by posture may induce compression of the cauda equina. These pressure changes may explain the postural dependency in eliciting symptoms.
K Takahashi; T Miyazaki; T Takino; T Matsui; K Tomita
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Spine     Volume:  20     ISSN:  0362-2436     ISO Abbreviation:  Spine     Publication Date:  1995 Mar 
Date Detail:
Created Date:  1995-08-10     Completed Date:  1995-08-10     Revised Date:  2010-03-24    
Medline Journal Info:
Nlm Unique ID:  7610646     Medline TA:  Spine (Phila Pa 1976)     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  650-3     Citation Subset:  IM; S    
Department of Orthopaedic Surgery, Ishikawa Prefectural Central Hospital, Japan.
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MeSH Terms
Epidural Space / physiopathology*
Lumbar Vertebrae / physiopathology*
Middle Aged
Posture / physiology
Spinal Stenosis / physiopathology*
Transducers, Pressure*

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