Do different characteristics of two emasculators make a difference in equine castration?
Authors: Comino F, Giusto G, Caramello V, Gandini M
Journal: Equine veterinary journal
Summary
# Editorial Summary: Emasculator Design and Haemostatic Efficacy in Equine Castration Comino and colleagues conducted an ex vivo comparison of two commonly used emasculators—the Serra and Reimer—to determine whether their different jaw profiles and haemostatic mechanisms influenced bleeding control in open versus closed castration techniques. Using 80 cadaver testes randomised to open or closed procedures, the researchers measured testicular artery leaking pressure via dye injection and assessed parietal tunic tensile strength in closed castration. In open castration, the Reimer emasculator demonstrated substantially superior haemostasis, resisting median pressures of 706.1 mmHg compared to the Serra's 349.4 mmHg (P<0.001); however, this advantage disappeared in closed castration, where both instruments performed similarly (Reimer 419.2 mmHg, Serra 382.5 mmHg). Parietal tunic integrity did not differ significantly between emasculators regardless of technique. These findings suggest practitioners performing open castration may achieve more reliable vascular occlusion with the Reimer emasculator, though the protective effect of the visceral tunic in closed castration appears to neutralise the haemostatic superiority of either instrument—a particularly relevant consideration when selecting technique for high-risk individuals or those with bleeding disorders.
Read the full abstract on PubMed
Practical Takeaways
- •Consider using Reimer emasculators for open castration procedures, as they demonstrate superior haemostatic performance in this technique
- •Choice of emasculator (Serra vs Reimer) appears less critical for closed castration, as haemostatic outcomes are comparable
- •Ex vivo study design limits direct clinical application; results do not account for in vivo factors such as tissue inflammation, oedema, or long-term post-operative outcomes
Key Findings
- •In open castration, Reimer emasculator achieved significantly higher leaking pressure (706.1 mmHg) compared to Serra emasculator (349.4 mmHg, P<0.001)
- •No significant difference in haemostatic capacity between Reimer and Serra emasculators in closed castration (419.2 vs 382.5 mmHg respectively)
- •Reimer emasculator showed significantly higher pressure resistance in open (706.1 mmHg) versus closed (419.2 mmHg) castration (P=0.03)
- •Parietal tunic tensile strength did not differ significantly between Serra (12.65±7.35) and Reimer (17.55±11.76) emasculators in closed castration