How securely is the testicular artery occluded in the spermatic cord by using a ligature?
Authors: Rijkenhuizen A B M, Sommerauer S, Fasching M, Velde K, Peham C
Journal: Equine veterinary journal
Summary
# Editorial Summary Controlling haemorrhage during equine castration depends critically on secure occlusion of the testicular artery, yet no previous research had formally evaluated different ligation techniques. Rijkenhuizen and colleagues compared two commonly used spermatic cord ligation methods—single knot loop and double knot loop—using pressure-resistance testing on equine testicular arteries and mechanical tensile-strength evaluation to determine which technique provides superior vascular occlusion and structural integrity. Both techniques withstood normal physiological intravascular pressure (mean failure pressures of 354.4 and 303.2 mmHg respectively, with no significant difference), though the single knot loop demonstrated significantly greater tensile strength at failure compared to the double knot loop (P = 0.028) when subjected to single cycle-to-failure loading. The practical advantage of the single knot loop extends beyond its superior breaking strength; it requires less time to perform during surgery, potentially reducing operative duration without compromising vascular security. These findings suggest the single knot loop represents the more efficient choice for equine castration, offering better mechanical resilience and procedural efficiency, though both techniques appear clinically adequate for preventing post-operative haemorrhage under normal conditions.
Read the full abstract on PubMed
Practical Takeaways
- •Single knot loop ligature is the preferred technique for equine spermatic cord ligation, offering greater tensile strength and requiring less operative time than double knot loop
- •Both techniques are mechanically adequate to prevent hemorrhage under normal conditions, but single knot loop provides a safety margin with higher breaking strength
- •Simplified ligature technique reduces time spent on spermatic cord occlusion during equine castration without compromising security of vessel occlusion
Key Findings
- •Single knot loop ligature sustained significantly greater maximal tensile force at failure compared to double knot loop (P = 0.028)
- •Mean peak force at failure was 354.4 ± 91.7 mmHg for single knot loop versus 303.2 ± 62.0 mmHg for double knot loop in pressure-resistance testing
- •Both ligature techniques withstand normal physiological intravascular pressure without significant difference in pressure-resistance test results
- •Single knot loop technique is less time-consuming to perform than double knot loop while providing superior breaking strength