Cystometrography and urethral pressure profiles in healthy horse and pony mares.

The researchers performed bladder and urethral pressure tests in horse and pony mares, before and after sedation, and found no significant differences in the pressure values. However, the amount of liquid (in milliliters) needed to trigger initial urination was significantly different between the nonsedated horses and ponies.

Introduction

This research focused on examining cystometrography (tests examining the bladder’s ability to store and expel urine) and urethral pressure profiles in horse mares and pony mares. Specifically, readings were taken before and after the animals were sedated. The primary motive of the research was to discern whether there were any significant differences in the readings between nondesated and sedated animals, and between horses and ponies.

Method

• The study comprised 7 horse mares and 5 pony mares.
• Using cystometrography, the maximal bladder contraction pressure was calculated for each animal, both before and after sedation.
• The maximal urethral closure pressure was also taken using urethral pressure profiles for each animal, before and after sedation.
• The threshold volume, which is the amount of liquid that triggers the initial urination, was also determined for each animal.

Results

• The mean maximal bladder contraction pressure was 91.4 cm of H2O in horses and 86.0 cm of H2O in ponies.
• The mean maximal urethral closure pressure was 49.1 cm of H2O in horses and 37.7 cm of H2O in ponies.
• No significant difference was found between the nonsedated and sedated animals for these values.
• However, there was a significant difference in the threshold volume between nonsedated horses (1,982 ml) and ponies (825 ml), implying that it takes a larger amount of liquid to trigger urination in nonsedated horses than in ponies.

Conclusion

The observations from the research demonstrated that there were no significant differences in the bladder and urethral pressure before and after sedating the horses and ponies. However, a significant variation was established in the threshold volume between the nonsedated horses and ponies. This discovery can contribute to in-depth research in veterinary sciences concerning urination inconsistencies in different-sized animals.