Document Detail

Posterior annular strains during discography.
MedLine Citation:
PMID:  11481559     Owner:  NLM     Status:  MEDLINE    
Discography is commonly used in the workup of back disorders. The clinical utility of the test is controversial, and little is known about mechanical changes that may occur in the disc during this exam. To quantify three-dimensional deformations of the posterior annulus during discography, and to examine some of the covariates that influence the deformations, displacements of the lumbar posterior annulus were measured during discographic injection for three different spinal positions. Disc bulge and annular strains were calculated from the displacements. The combined effect of disc pressurization, spine position, and location on the disc (lateral versus midline) explained much of the variation in the measured bulges and strains (r(2) = 0.56). Disc pressurization or spine position alone did not always have a significant effect on strains, and the strains and bulges were often influenced by the interactions between position of the spine, location of the disc, and pressurization. In clinical studies of discography, these results suggest that patient position during the examination should be standardized.
C A Reitman; J A Hipp; B C Kirking; S Haas; S I Esses
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of spinal disorders     Volume:  14     ISSN:  0895-0385     ISO Abbreviation:  J Spinal Disord     Publication Date:  2001 Aug 
Date Detail:
Created Date:  2001-08-01     Completed Date:  2001-09-13     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8904842     Medline TA:  J Spinal Disord     Country:  United States    
Other Details:
Languages:  eng     Pagination:  347-52     Citation Subset:  IM    
Department of Orthopedic Surgery, Baylor College of Medicine, Houston, Texas 77030, USA.
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MeSH Terms
Aged, 80 and over
Intervertebral Disk / radiography*
Lumbar Vertebrae / radiography*
Middle Aged
Movement / physiology
Posture / physiology
Spine / physiopathology*
Stress, Mechanical
Tomography, X-Ray Computed

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

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