Changes in digital venous pressures of horses moving at the walk and trot.

The research article discusses a study where the researchers monitored changes in blood pressure within the digital veins of horses’ forelimbs during rest, walking, and trotting. A link was identified between these pressures and stride phases, weight-bearing forces, and potential involvement in impact dissipation.

Methodology

• The study involved six clinically normal horses. Their digital venous pressures were monitored at three different states – rest, walk, and trot.
• To monitor the digital venous pressures, the lateral digital vein of the horses’ forelimbs was catheterized.
• The results were drawn in comparison with the phases of the horse’s stride and weight-bearing forces.
• Stride and weight-bearing forces were monitored through electrogoniometry, a technique used to measure joint angles, and a force platform, a device that measures the ground reaction forces produced by a body standing on them.

Findings

• The study found out that increases in the pressure of the digital veins were immediately observed before the forces reached their maximum during the support period of the stride.
• In the trot, the peak vertical forces experienced by the horse showed a close relationship with the increases in peak digital venous pressures.

Interpretation

• The results suggest that the hydrodynamics – the principles of fluids in motion – of the digital circulatory system of horses play a role in absorbing the initial impact when a horse’s hoof strikes the ground at the walk and the trot.
• Essentially, the changes in digital venous pressures could serve as a mechanism to help absorb the force of the impact, mitigating potential damage or injury to the horse.

Significance

• This research is crucial in understanding the internal mechanisms that protect horses’ limbs during motion, providing valuable insights for veterinary medicine, particularly pathology related to equine locomotion.
• The findings could help design better strategies for the care, training, and treatment of horse injuries related to locomotion.