Document Detail


Damage of the auditory system associated with acute blast trauma.
MedLine Citation:
PMID:  2497695     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This paper reviews the results of several studies on the effects of blast wave exposure on the auditory system of the chinchilla, the pig, and the sheep. The chinchillas were exposed at peak sound pressure levels of approximately 160 dB under well-controlled laboratory conditions. A modified shock tube was used to generate the blast waves. The pigs and sheep were exposed under field conditions in an instrumented hard-walled enclosure. Blast trauma was induced by the impact of a single explosive projectile. The peak sound pressure levels varied between 178 and 209 dB. All animals were killed immediately following exposure, and their temporal bones were removed for fixation and histologic analysis using light microscopy and scanning electron microscopy. Middle ears were examined visually for damage to the conductive system. There were well-defined differences in susceptibility to acoustic trauma among species. However, common findings in each species were the acute mechanical fracture and separation of the organ of Corti from the basilar membrane, and tympanic membrane and ossicular failure.
Authors:
M Roberto; R P Hamernik; G A Turrentine
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Review    
Journal Detail:
Title:  The Annals of otology, rhinology & laryngology. Supplement     Volume:  140     ISSN:  0096-8056     ISO Abbreviation:  Ann Otol Rhinol Laryngol Suppl     Publication Date:  1989 May 
Date Detail:
Created Date:  1989-06-09     Completed Date:  1989-06-09     Revised Date:  2008-02-21    
Medline Journal Info:
Nlm Unique ID:  1256156     Medline TA:  Ann Otol Rhinol Laryngol Suppl     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  23-34     Citation Subset:  IM    
Affiliation:
Department of Bioacoustics, University of Bari, Italy.
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MeSH Terms
Descriptor/Qualifier:
Animals
Blast Injuries / pathology*
Chinchilla
Cochlea / injuries*
Hearing Loss, Noise-Induced / pathology*
Microscopy, Electron, Scanning
Rupture
Sheep
Swine
Tympanic Membrane / injuries*

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


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