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Dynamic upper respiratory abnormalities in Thoroughbred racehorses in South Africa.
J S Afr Vet Assoc. 2014 Nov 14; 85(1):1140.JS

Abstract

Upper airway endoscopy at rest has been the diagnostic method of choice for equine upper respiratory tract (URT) conditions. Development of high-speed treadmill endoscopy improved the sensitivity of URT endoscopy by allowing observation of the horse's nasopharynx and larynx during exercise. However, treadmill exercise may not always accurately represent the horse's normal exercise as track surface, rider, tack and environmental variables are altered. Recently, the development of dynamic overground endoscopy (DOE) has addressed some of these shortcomings. A retrospective study was undertaken to describe the URT abnormalities detected during DOE in racehorses presenting with poor performance and/or abnormal respiratory noise. Patient records of Thoroughbred racehorses undergoing DOE from November 2011 to August 2012 were reviewed. Data collected included signalment, primary complaint, distance exercised, maximum speed and dynamic airway abnormalities detected. Fifty-two horses underwent DOE for investigation of poor performance and/or abnormal respiratory noise. The main abnormalities detected included axial deviation of the aryepiglottic folds (40%), vocal cord collapse (35%), abnormal arytenoid function (33%) and dorsal displacement of the soft palate (25%). A total of 40 horses were diagnosed with one or more abnormalities of the URT (77%). Fifteen horses (29%) had a single abnormality and 25 horses (48%) had multiple abnormalities. This study showed that DOE is a useful technique for investigating dynamic disorders of the URT in racehorses in South Africa. The total number and type of dynamic pathological conditions were comparable with those identified in similar populations in other geographical locations.

Authors+Show Affiliations

Department of Companion Animal Clinical Studies, University of Pretoria. javier.mirazo@gmail.com.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

25686356

Citation

Mirazo, Javier E., et al. "Dynamic Upper Respiratory Abnormalities in Thoroughbred Racehorses in South Africa." Journal of the South African Veterinary Association, vol. 85, no. 1, 2014, p. 1140.
Mirazo JE, Page P, Rubio-Martinez L, et al. Dynamic upper respiratory abnormalities in Thoroughbred racehorses in South Africa. J S Afr Vet Assoc. 2014;85(1):1140.
Mirazo, J. E., Page, P., Rubio-Martinez, L., Marais, H. J., & Lyle, C. (2014). Dynamic upper respiratory abnormalities in Thoroughbred racehorses in South Africa. Journal of the South African Veterinary Association, 85(1), 1140. https://doi.org/10.4102/jsava.v85i1.1140
Mirazo JE, et al. Dynamic Upper Respiratory Abnormalities in Thoroughbred Racehorses in South Africa. J S Afr Vet Assoc. 2014 Nov 14;85(1):1140. PubMed PMID: 25686356.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dynamic upper respiratory abnormalities in Thoroughbred racehorses in South Africa. AU - Mirazo,Javier E, AU - Page,Patrick, AU - Rubio-Martinez,Luis, AU - Marais,Hendrick J, AU - Lyle,Catriona, Y1 - 2014/11/14/ PY - 2013/11/18/received PY - 2014/04/02/accepted PY - 2014/09/09/revised PY - 2015/2/17/entrez PY - 2015/2/17/pubmed PY - 2015/10/20/medline SP - 1140 EP - 1140 JF - Journal of the South African Veterinary Association JO - J S Afr Vet Assoc VL - 85 IS - 1 N2 - Upper airway endoscopy at rest has been the diagnostic method of choice for equine upper respiratory tract (URT) conditions. Development of high-speed treadmill endoscopy improved the sensitivity of URT endoscopy by allowing observation of the horse's nasopharynx and larynx during exercise. However, treadmill exercise may not always accurately represent the horse's normal exercise as track surface, rider, tack and environmental variables are altered. Recently, the development of dynamic overground endoscopy (DOE) has addressed some of these shortcomings. A retrospective study was undertaken to describe the URT abnormalities detected during DOE in racehorses presenting with poor performance and/or abnormal respiratory noise. Patient records of Thoroughbred racehorses undergoing DOE from November 2011 to August 2012 were reviewed. Data collected included signalment, primary complaint, distance exercised, maximum speed and dynamic airway abnormalities detected. Fifty-two horses underwent DOE for investigation of poor performance and/or abnormal respiratory noise. The main abnormalities detected included axial deviation of the aryepiglottic folds (40%), vocal cord collapse (35%), abnormal arytenoid function (33%) and dorsal displacement of the soft palate (25%). A total of 40 horses were diagnosed with one or more abnormalities of the URT (77%). Fifteen horses (29%) had a single abnormality and 25 horses (48%) had multiple abnormalities. This study showed that DOE is a useful technique for investigating dynamic disorders of the URT in racehorses in South Africa. The total number and type of dynamic pathological conditions were comparable with those identified in similar populations in other geographical locations. SN - 2224-9435 UR - https://www.unboundmedicine.com/medline/citation/25686356/Dynamic_upper_respiratory_abnormalities_in_Thoroughbred_racehorses_in_South_Africa_ DB - PRIME DP - Unbound Medicine ER -