Effect of displaced versus non-displaced pelvic fractures on long-term racing performance in 31 Thoroughbred racehorses.

The research looks into the impact of displaced and non-displaced fractures on the long-term racing performance of 31 Thoroughbred racehorses. Findings reveal that the type of fracture has an effect on the frequency of racing post-injury but may not significantly influence race earnings.

Research Methodology

• The study involved a retrospective case analysis where the medical records of 31 Thoroughbred racehorses with pelvic fractures were thoroughly reviewed.
• These fractures were identified through scintigraphy and afterwards defined as displaced or non-displaced based on findings from ultrasound and/or radiographic tests.
• The race histories of the horses were analyzed, focusing specifically on a minimum of 24 months after the diagnosis of the fracture.
• This data was then correlated with the type of fracture the horse had in order to determine the long-term prognosis for racing.

Research Results

• It was found that single site fractures were more frequent than fractures involving two sites.
• The ilial wing was identified as the most commonly affected site.
• It was observed that Thoroughbred racehorses with displaced pelvic fractures raced less frequently within 24 months of the diagnosis compared with horses with non-displaced fractures.
• However, no remarkable statistical difference was found in race earnings between the two groups.
• Significantly, four horses with displaced fractures were euthanized on humane grounds due to persistent severe pain.
• When these horses were excluded from the analysis, no differences in performance variables were observed between horses with a displaced or non-displaced pelvic fracture.

Conclusions

• The study concludes that Thoroughbred racehorses with a displaced or non-displaced pelvic fracture that survive the initial post-injury period have a good prognosis for racing.
• This suggests that while the frequency of racing may be moderately affected, the type of pelvic fracture may not have a substantial impact on the horses’ racing performance in the long term.