Complications associated with closed castration using the Henderson equine castration instrument in 300 standing equids.

The research article presents a study done on the complications related with the closed castration technique using the Henderson equine castration instrument in 300 standing equids. The study also identifies the different factors that potentially increase the risk of postoperative complications.

Methodology

• The study was a prospective cohort study that included 300 standing equids (horses, donkeys, and ponies) that were castrated using the Henderson Equine Castrating Instrument.
• Thirteen veterinarians took part in the study, recording data on intraoperative difficulties experienced during castration and the postoperative complications.
• The information collected was statistically analyzed using methods like descriptive statistics, univariate analyses with Fisher’s exact tests, and logistic regressions. This information was used to evaluate the complications and risks associated with the procedure.

Results

• In the sample size of 300 equids, intraoperative difficulties were recorded in 39 (13%) procedures.
• Postoperative complications arose in 69 of the 300 equids (23%). These were mostly of excessive swelling (29, 9.67%), followed by surgical site infection (SSI; 27, 9%), severe hemorrhage (3, 1%), and omentum prolapse (2, 0.64%).
• Donkeys were particularly at a raised risk of severe hemorrhage (2 out of 8, 25%).
• Evidently, equids castrated in a hospital setting (83 out of 300) often developed excessive swelling and SSI than those castrated in a field setting (217 out of 300).
• The age of the equid at castration or extending antimicrobial prophylaxis did not seem to have a clear effect on the prevalence of excessive swelling or SSI.

Conclusions

• It was concluded that the overall prevalence of postoperative complications was similar to previous reports for standing horse castrations, albeit with fewer instances of SSI.
• However, this castration technique wasn’t recommended for donkeys, given the increased risk of severe hemorrhage.
• In summary, the research suggests that the Henderson method of equine castration can be a feasible option for horses and ponies if the risk factors are carefully managed.