Ex vivo comparison of the giant and transfixing knot in equine open and closed castration.
Authors: Comino F, Giusto G, Caramello V, Pagliara E, Bellino C, Gandini M
Journal: Equine veterinary journal
Summary
# Editorial Summary: Giant versus Transfixing Knots in Equine Castration Understanding how to reliably prevent post-operative haemorrhage and evisceration during equine castration remains clinically important, yet surprisingly little evidence supports the specific techniques commonly used. Researchers conducted an ex vivo study using 144 testicles to compare the haemostatic efficacy of the giant knot, transfixing knot, and emasculator alone across both open and closed castration methods, measuring leaking pressure of the testicular artery and suture material consumption, alongside parietal tunic tensile strength in closed procedures. Both knot techniques provided comparable haemostatic capability, though the giant knot achieved similar results whilst requiring considerably less suture material than the transfixing knot. In open castration, emasculator application alone produced adequate pressure resistance; however, in closed castration—where the parietal tunic presents additional anatomical considerations—combining either knot with the emasculator substantially increased bursting pressure above standard physiological arterial pressures and may meaningfully reduce haemorrhage and evisceration risk. These findings suggest practitioners can confidently use the more economical giant knot rather than transfixing techniques in closed procedures without compromising safety, whilst supporting a more conservative approach to open castration where ligature application may be less critical.
Read the full abstract on PubMed
Practical Takeaways
- •For closed castration, combine the emasculator with a giant knot to increase bursting pressure and reduce haemorrhage risk, while using less suture material than alternative methods
- •In open castration, the emasculator alone may provide adequate haemostasis without additional ligature, simplifying the procedure
- •Adding a ligature in closed castration appears protective against evisceration, an important complication consideration for this technique
Key Findings
- •Giant knot and transfixing knot have comparable haemostatic capability and parietal tunic tensile strength in both open and closed castration
- •Giant knot requires significantly less suture material than transfixing knot while maintaining equivalent haemostasis
- •In closed castration, emasculator plus transfixing knot and emasculator alone produced leaking pressures close to standard physiological arterial pressures, indicating potential inadequacy
- •Application of ligatures increased parietal tunic tensile strength in closed castration, potentially reducing evisceration risk