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Overground endoscopy in 311 Thoroughbred racehorses: findings and correlation to resting laryngeal function.
Aust Vet J. 2017 Sep; 95(9):338-342.AV

Abstract

OBJECTIVE

To review a large number of equine overground endoscopy (OGE) examinations to determine the incidence of dynamic upper airway obstructions (DUAO); correlations were explored with laryngeal endoscopy findings at rest and abnormal exercising respiratory noise.

METHODS

Retrospective analysis of horses presenting for OGE because of perceived poor performance and/or history of abnormal exercising respiratory noise between 2010 and 2014. Signalment, history and examination findings during resting laryngeal endoscopy and OGE were reviewed.

RESULTS

Of the total examinations, 311 were reviewed. One or more DUAO were found in 249/311 horses. From 210 males (colts and geldings), 121 had arytenoid cartilage collapse (ACC) and 111 had vocal fold collapse (VFC). From 101 females, 25 had intermittent dorsal displacement of the soft palate (DDSP). Resting laryngeal function grade 4 was found in 121/311 of the study population and 92/210 of males. An association was found between horses with lower resting arytenoid abduction ability to dynamic ACC and higher resting arytenoid abduction ability with DDSP. Abnormal exercising respiratory noise was positively associated with the presence of DUAO.

CONCLUSIONS

Multiple DUAO in association with abnormal exercising respiratory noise was a common finding in horses examined for poor performance. This study highlights the importance of OGE in accurately diagnosing the nature of DUAO associated with poor performance.

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Authors+Show Affiliations

Davison JA
Rossdales Equine Practice, Beaufort Cottage Stables, Newmarket, Suffolk, CB8 8JS, UK.
Lumsden JM
Randwick Equine Centre, Randwick, New South Wales, Australia.
Boston RC
University of Pennsylvania, New Bolton Center, PA, USA.
Ahern BJ
University of Queensland, UQ Gatton Campus, Gatton, Queensland, Australia.

MeSH

AnimalsEndoscopyFemaleHorse DiseasesHorsesLarynxMalePhysical Conditioning, AnimalRespiratory System AbnormalitiesRetrospective Studies

Pub Type(s)

Journal Article
Review

Language

eng

PubMed ID

28845565

Citation

Davison, J A., et al. "Overground Endoscopy in 311 Thoroughbred Racehorses: Findings and Correlation to Resting Laryngeal Function." Australian Veterinary Journal, vol. 95, no. 9, 2017, pp. 338-342.
Davison JA, Lumsden JM, Boston RC, et al. Overground endoscopy in 311 Thoroughbred racehorses: findings and correlation to resting laryngeal function. Aust Vet J. 2017;95(9):338-342.
Davison, J. A., Lumsden, J. M., Boston, R. C., & Ahern, B. J. (2017). Overground endoscopy in 311 Thoroughbred racehorses: findings and correlation to resting laryngeal function. Australian Veterinary Journal, 95(9), 338-342. https://doi.org/10.1111/avj.12620
Davison JA, et al. Overground Endoscopy in 311 Thoroughbred Racehorses: Findings and Correlation to Resting Laryngeal Function. Aust Vet J. 2017;95(9):338-342. PubMed PMID: 28845565.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Overground endoscopy in 311 Thoroughbred racehorses: findings and correlation to resting laryngeal function. AU - Davison,J A, AU - Lumsden,J M, AU - Boston,R C, AU - Ahern,B J, PY - 2016/07/04/received PY - 2016/11/12/revised PY - 2016/12/12/accepted PY - 2017/8/29/entrez PY - 2017/8/29/pubmed PY - 2017/11/29/medline KW - arytenoid cartilage KW - horses KW - overground endoscopy KW - upper airway obstruction SP - 338 EP - 342 JF - Australian veterinary journal JO - Aust Vet J VL - 95 IS - 9 N2 - OBJECTIVE: To review a large number of equine overground endoscopy (OGE) examinations to determine the incidence of dynamic upper airway obstructions (DUAO); correlations were explored with laryngeal endoscopy findings at rest and abnormal exercising respiratory noise. METHODS: Retrospective analysis of horses presenting for OGE because of perceived poor performance and/or history of abnormal exercising respiratory noise between 2010 and 2014. Signalment, history and examination findings during resting laryngeal endoscopy and OGE were reviewed. RESULTS: Of the total examinations, 311 were reviewed. One or more DUAO were found in 249/311 horses. From 210 males (colts and geldings), 121 had arytenoid cartilage collapse (ACC) and 111 had vocal fold collapse (VFC). From 101 females, 25 had intermittent dorsal displacement of the soft palate (DDSP). Resting laryngeal function grade 4 was found in 121/311 of the study population and 92/210 of males. An association was found between horses with lower resting arytenoid abduction ability to dynamic ACC and higher resting arytenoid abduction ability with DDSP. Abnormal exercising respiratory noise was positively associated with the presence of DUAO. CONCLUSIONS: Multiple DUAO in association with abnormal exercising respiratory noise was a common finding in horses examined for poor performance. This study highlights the importance of OGE in accurately diagnosing the nature of DUAO associated with poor performance. SN - 1751-0813 UR - https://www.unboundmedicine.com/medline/citation/28845565/Overground_endoscopy_in_311_Thoroughbred_racehorses:_findings_and_correlation_to_resting_laryngeal_function_ L2 - https://doi.org/10.1111/avj.12620 DB - PRIME DP - Unbound Medicine ER -