Comparison of treatment outcomes for superficial digital flexor tendonitis in National Hunt racehorses.

This study examined the treatment outcomes for superficial digital flexor (SDF) tendonitis, a common injury in Thoroughbred racehorses. It found that different treatments, such as controlled exercise alone, bar firing, and intralesional platelet-rich plasma (PRP), offered similar outcomes. Neither the type of treatment nor the severity of the injury was associated with the horse’s ability to return to racing or its performance post-injury.

Overview of the Study

• This research was an observational case-control study investigating the outcomes of common treatments for SDF tendonitis, an injury frequent among National Hunt racehorses.
• The data were collected from clinical and racing records of 127 racehorses that were treated for SDF tendonitis between 2007 and 2011.
• For each case horse, two age- and sex-matched control horses were selected to scrutinize the effect of pre-injury data, lesion severity, and treatment group on post-injury outcomes.

Treatments Examined

• The treatments evaluated in this study included controlled exercise alone, bar firing, intralesional platelet-rich plasma (PRP), tendon splitting, and a combination of tendon splitting with bar firing.
• The study aimed to determine if any of these treatments provided differing outcomes in regards to return to racing and subsequent racing performance.

Results of the Study

• The study found that the control horses raced more often than the case horses, with higher maximum racing post rating (RPRmax) and longer racing distances.
• No association was identified between pre-injury racing performance and the subsequent treatment group.
• Additionally, neither the severity of the injury nor the treatment administered appeared to influence the rate of return to racing, the number of subsequent races, total distance raced post-injury, or the RPRmax.
• Controlled exercise alone offered post-injury racing outcomes comparable to the other treatment options analyzed in the study. Hence, the application of techniques such as bar firing – either standalone or paired with tendon splitting – didn’t provide any additional benefit in the rate of return to racing and post-injury racing performance.

Implications of the Study

• This research indicates that multiple therapeutic approaches can be employed for the treatment of SDF tendonitis in racehorses, with no apparent difference in racing outcomes.
• The absence of differing outcomes across treatments signifies that simpler, potentially less invasive methods such as controlled exercise alone, could be an effective approach to managing SDF tendonitis.
• The study’s results express a need for further evaluation and improvement of treatment strategies for SDF tendonitis in racehorses, as the condition disrupts the horses’ ability to race post-injury regardless of the treatment received.