Studies on serial resting and dynamic endoscopic examination of thoroughbred yearlings

Kelly, Padraig G. (2016) Studies on serial resting and dynamic endoscopic examination of thoroughbred yearlings. MVM(R) thesis, University of Glasgow.

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Abstract

Resting endoscopic examination of Thoroughbred (TB) yearlings is a frequently performed procedure, the interpretation of which can have a profound effect on the financial value of the horse. In some instances this procedure is performed by multiple people and on multiple occasions and this has potential welfare implications for the animal. It is also accepted that poor correlation exists between the results of resting and dynamic endoscopic examinations in older horses however no comparison has been performed in the TB Yearling. The objective of this study was to investigate the application of dynamic endoscopic examination in this age group and in doing so to correlate the results of resting and dynamic examinations. The study was divided into two parts. In Part I, resting and dynamic endoscopic examination of a cohort of juvenile horses was performed and the results of each examination were compared. In Part II, further longitudinal resting and dynamic endoscopic examinations were performed and the results were correlated with those identified in Part I. Dynamic examination was very well tolerated and minimal complications were observed. Disease not previously reported in TB yearlings was identified. Comparison of the results of resting and dynamic examination identified poor correlation between these two diagnostic techniques with a greater prevalence of disease identified during dynamic examination. Comparison of the results obtained at different time points indicate that there is considerable variability in the endoscopic appearance of the larynx and pharynx during both resting and dynamic examinations with a decrease in the prevalence of IDDSP as the horses mature and fitness increases. It is concluded that dynamic endoscopic examination of TB yearlings is a safe and viable technique that provides a more accurate assessment of current airway function than resting endoscopic examination. This study provides valuable information on the progression of disease in young racehorses, however, based on these results our ability to accurately and reliably predict future airway function remains limited and significant further studies are required.

Item Type: Thesis (MVM(R))
Qualification Level: Masters
Keywords: Endoscopy, dynamic endoscopy, horse, yearling.
Subjects: S Agriculture > SF Animal culture > SF600 Veterinary Medicine
Colleges/Schools: College of Medical Veterinary and Life Sciences > School of Veterinary Medicine
Funder's Name: UNSPECIFIED
Supervisor's Name: Pollock, Mr. Patrick J.
Date of Award: 2016
Depositing User: MR Padraig Gerard Kelly
Unique ID: glathesis:2016-7248
Copyright: Copyright of this thesis is held by the author.
Date Deposited: 12 May 2016 08:45
Last Modified: 23 May 2016 10:29
URI: http://theses.gla.ac.uk/id/eprint/7248
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