| Dynamic obstructions of the equine upper respiratory tract. Part 2: comparison of endoscopic findings at rest and during high-speed treadmill exercise of 600 Thoroughbred racehorses. | |
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MedLine Citation:
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PMID: 16986599 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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REASONS FOR PERFORMING STUDY: The reliability of diagnoses of obstructive conditions of the upper respiratory tract (URT) based on examinations performed at rest vs. at exercise is controversial. OBJECTIVE: To compare diagnosis of URT by endoscopy at rest with that achieved during high-speed treadmill exercise (HSTE). HYPOTHESIS: Endoscopy of URT at rest, when performed in isolation from other simpler techniques is unreliable in the prediction of dynamic respiratory obstructions. METHODS: Endoscopic findings of 600 Thoroughbred racehorses during quiet breathing were compared with findings during high-speed treadmill exercise. Other parameters were also assessed for their specificity in diagnosis. RESULTS: Endoscopy of the resting horse showed low sensitivity (0.15) in the diagnosis of dorsal displacement of the soft palate (DDSP) and palatal instability (PI). When endoscopy and reported noises were taken together there was still a 35% misdiagnosis rate. Although there was significant association between resting laryngeal function score (LFS) and dynamic vocal cord and/or arytenoid cartilage collapse at exercise, 19% of horses with a grade 4/5 LFS were able to attain and maintain full abduction during exercise and 7% of those with 'normal' grades 1 or 2 LFS at rest showed dynamic laryngeal collapse when exerted. Sensitivity of the diagnostic model was greatly increased (80%) when a history of inspiratory noise and palpable intrinsic muscle atrophy were included. CONCLUSIONS AND POTENTIAL RELEVANCE: Endoscopy of the upper respiratory tract of static horses is unreliable in the diagnosis of dynamic obstructions of the URT and should not be used in isolation in surgical decision-making or in the assessment of horses at the time of sale. |
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Authors:
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J G Lane; B Bladon; D R M Little; J R J Naylor; S H Franklin |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Equine veterinary journal Volume: 38 ISSN: 0425-1644 ISO Abbreviation: Equine Vet. J. Publication Date: 2006 Sep |
Date Detail:
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Created Date: 2006-09-21 Completed Date: 2006-10-24 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0173320 Medline TA: Equine Vet J Country: England |
Other Details:
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Languages: eng Pagination: 401-7 Citation Subset: IM |
Affiliation:
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Department of Clinical Veterinary Science, University of Bristol, Langford, UK. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Age Factors Airway Obstruction / diagnosis, etiology, veterinary* Animals Arytenoid Cartilage / physiopathology Diagnosis, Differential Endoscopy / methods, veterinary* Exercise Test / veterinary Female Horse Diseases / diagnosis*, etiology Horses Larynx / abnormalities, physiopathology Male Nasopharynx / abnormalities, physiopathology Palate, Soft / abnormalities, physiopathology Physical Conditioning, Animal / physiology* Respiratory Sounds / diagnosis, physiopathology, veterinary Respiratory System Abnormalities / diagnosis, physiopathology, veterinary* Rest / physiology* Retrospective Studies Sensitivity and Specificity Severity of Illness Index Video Recording |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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