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Ultrasonographic-based predictive factors influencing successful return to racing after superficial digital flexor tendon injuries in flat racehorses: a retrospective cohort study in 469 Thoroughbred racehorses in Hong Kong

Alzola, R.; Easter, C.; Riggs, C.M.; Gardner, D.S.; Freeman, S.L.

Authors

R. Alzola

C. Easter

C.M. Riggs

D.S. Gardner

S.L. Freeman



Abstract

Background: Superficial digital flexor tendon (SDFT) injury is an important health and welfare concern in racehorses. It is generally diagnosed with ultrasonography, predictive ultrasonographic features have not been reported.
Objectives: To determine ultrasonographic features of forelimb SDFT injury at initial presentation in Thoroughbred racehorses, that could predict a successful return to racing (completing > or = 5 races).
Study Design: Retrospective cohort study.
Methods: Digitised ultrasonographic images of 469 horses with forelimb SDFT injuries from the Hong Kong Jockey Club (2003-2014) were evaluated, using a previously validated ultrasonographic scoring system. Six ultrasonographic parameters were evaluated (type and extent of the injury, location, echogenicity, cross-sectional area and longitudinal fiber pattern of the maximal injury zone (MIZ)), as well as horse signalment, retirement date and number of races before and after injury. Data was analysed by generalized linear regression with significance at P or = 50% this decreased to 11-16%. 2) For cases of SDFT tendonitis without a core lesion, longitudinal fiber pattern at the MIZ best predicted a successful return to racing (P=0.002); if the affected longitudinal fiber pattern was or = 75% this decreased to 14%.
Main Limitations: Prognostic information may not be applicable to other breeds/disciplines.
Conclusions: This is the first study to describe ultrasonographic features of forelimb SDFT injuries at initial presentation that were predictive of successful return to racing. The outcomes will assist with early, evidence-based decisions on prognosis in Thoroughbred racehorses.

Journal Article Type Article
Publication Date Sep 1, 2018
Journal Equine Veterinary Journal
Print ISSN 0425-1644
Electronic ISSN 2042-3306
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 50
Issue 5
Pages 602-608
APA6 Citation Alzola, R., Easter, C., Riggs, C., Gardner, D., & Freeman, S. (2018). Ultrasonographic-based predictive factors influencing successful return to racing after superficial digital flexor tendon injuries in flat racehorses: a retrospective cohort study in 469 Thoroughbred racehorses in Hong Kong. Equine Veterinary Journal, 50(5), 602-608. https://doi.org/10.1111/evj.12810
DOI https://doi.org/10.1111/evj.12810
Publisher URL http://onlinelibrary.wiley.com/doi/10.1111/evj.12810/abstract
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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