Document Detail


Ventroaxial luxation of the apex of the corniculate process of the arytenoid cartilage in resting horses during induced swallowing or nasal occlusion.
MedLine Citation:
PMID:  17461944     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: To report ventroaxial luxation of the apex of the left or right corniculate process of the arytenoid cartilage under the contralateral corniculate process during resting endoscopic examination, and morphologic features of the larynx of 1 affected horse.
STUDY DESIGN: Retrospective study.
ANIMALS: Horses (n=8).
METHODS: Horses had endoscopic examination as part of a survey of Clydesdale horses (n=7), or investigation of poor performance in Thoroughbred horses (1). One Clydesdale was euthanatized and the larynx examined; 4 cadaver larynges from normal horses were also examined.
RESULTS: Ventroaxial luxation of the apex of the left or right corniculate process of the arytenoid cartilage was not detected during quiet breathing but was induced by swallowing or nasal occlusion. Prevalence in Clydesdales was 5.2% (7/133). A Thoroughbred with identical endoscopic appearance of the larynx at rest had progressive ventroaxial luxation of the apex of the arytenoid cartilage during high-speed treadmill endoscopy, associated with abnormal respiratory noise. Necropsy examination of an affected Clydesdale larynx revealed an excessively wide (10 mm) transverse arytenoid ligament that allowed easy separation of the apices of the corniculate processes. In normal cadaver larynges, the apices could not be separated with abaxial traction.
CLINICAL RELEVANCE: The clinical relevance of this laryngeal observation in resting horses is unclear. Ventroaxial luxation of the corniculate process of the arytenoid cartilage during induced swallowing or nasal occlusion in resting horses or during high-speed treadmill exercise may be caused by an abnormally wide transverse arytenoid ligament.
Authors:
S Z Barakzai; Cert Es; E M Milne; Padraic Dixon
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Veterinary surgery : VS     Volume:  36     ISSN:  0161-3499     ISO Abbreviation:  Vet Surg     Publication Date:  2007 Apr 
Date Detail:
Created Date:  2007-04-27     Completed Date:  2007-05-15     Revised Date:  2011-04-25    
Medline Journal Info:
Nlm Unique ID:  8113214     Medline TA:  Vet Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  210-3     Citation Subset:  IM    
Affiliation:
Division of Veterinary Clinical Studies, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Scotland, UK. safia.barakzai@ed.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Animals
Arytenoid Cartilage / pathology,  physiopathology*
Deglutition
Endoscopy / veterinary
Exercise Test / veterinary
Female
Horse Diseases / diagnosis*,  pathology
Horses
Laryngeal Diseases / diagnosis,  veterinary*
Ligaments / pathology,  physiopathology*
Male
Nasal Obstruction / diagnosis,  veterinary*
Physical Conditioning, Animal
Rest / physiology
Retrospective Studies

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


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