| Pressure profilometry of the lumbosacral disk in dogs. | |
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MedLine Citation:
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PMID: 11703016 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: To investigate the biomechanical behavior of the lumbosacral disk under compressive load in dogs, using pressure profilometry, and to investigate the relationship between pressure profile features and background and disease variables. SAMPLE POPULATION: 23 lumbosacral disks and adjacent vertebrae harvested from medium and large breed dogs. PROCEDURE: A 1.3-mm unidirectional needle-mounted pressure transducer was inserted into the disk in a ventral-to-dorsal manner while the disk was loaded in compression by a materials testing machine. Withdrawal of the transducer resulted in a pressure profile for cranial and lateral stress. Pressure profiles were analyzed, and relationships to age and gross evidence of degeneration were investigated. RESULTS: There was a moderate positive correlation between age and degree of nuclear degeneration (r(s) = 0.420, P = 0.046), but no relationship between age and mean nuclear pressure was detected. Mean nuclear pressure correlated negatively with severity of degenerative changes in the nucleus pulposus. Receiver operator characteristic curves to evaluate mean nuclear pressure as a diagnostic test for nuclear degeneration revealed a sensitivity and specificity of 82 and 83%, respectively. In addition, age was moderately correlated with the magnitude of stress peaks (r(s) = -0.571, P = 0.004). Stress peaks were not related to the severity of nuclear degeneration. CONCLUSIONS AND CLINICAL RELEVANCE: Determination of the mean nuclear pressure by disk profilometry provides information on the severity of lumbosacral disk degeneration with a high degree of sensitivity and specificity. The magnitude of single stress peaks within the dorsal annulus fibrosus is correlated with age and may not necessarily reflect advancing degeneration. |
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Authors:
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R A Mitchell; J F Innes; D McNally |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: American journal of veterinary research Volume: 62 ISSN: 0002-9645 ISO Abbreviation: Am. J. Vet. Res. Publication Date: 2001 Nov |
Date Detail:
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Created Date: 2001-11-12 Completed Date: 2002-04-18 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0375011 Medline TA: Am J Vet Res Country: United States |
Other Details:
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Languages: eng Pagination: 1734-9 Citation Subset: IM |
Affiliation:
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Department of Clinical Veterinary Science, Langford House, University of Bristol, UK. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Age Factors Animals Compressive Strength Dog Diseases / diagnosis, physiopathology Dogs / physiology* Female Intervertebral Disk / physiology*, physiopathology Lumbosacral Region Male Sex Factors Spinal Diseases / diagnosis, physiopathology, veterinary Statistics, Nonparametric Transducers, Pressure / veterinary |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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