| Ventroaxial luxation of the apex of the corniculate process of the arytenoid cartilage in resting horses during induced swallowing or nasal occlusion. | |
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MedLine Citation:
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PMID: 17461944 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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S Z Barakzai; Cert Es; E M Milne; Padraic Dixon |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Veterinary surgery : VS Volume: 36 ISSN: 0161-3499 ISO Abbreviation: Vet Surg Publication Date: 2007 Apr |
Date Detail:
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Created Date: 2007-04-27 Completed Date: 2007-05-15 Revised Date: 2011-04-25 |
Medline Journal Info:
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Nlm Unique ID: 8113214 Medline TA: Vet Surg Country: United States |
Other Details:
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Languages: eng Pagination: 210-3 Citation Subset: IM |
Affiliation:
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Division of Veterinary Clinical Studies, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Scotland, UK. safia.barakzai@ed.ac.uk |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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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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