Estimation of urinary flow rate in weanling and yearling horses.

The research investigates the relationship between urinary creatinine concentration and urinary flow rates in weanling and yearling horses, finding that while there is no general correlation, individual animals show consistent daily creatinine excretion patterns which allow for estimating flow rates.

Objective of the Study

• The main objective of the research was to validate the use of urinary creatinine concentration as an indicator of urinary flow rate in weanling and yearling ponies and Thoroughbreds.

Methodology

• The research involved timed quantitative urine collections from several groups of weanling and yearling ponies and Thoroughbreds.
• A total of 411 urine samples were generated by 19 ponies and 12 Thoroughbreds.
• The researchers measured the urinary flow rates and urinary creatinine concentrations of the collected samples to establish a relationship between the two variables.

Key Findings

• Examination of all collected data concluded that urinary flow rates were independent of creatinine concentrations, contradicting the original hypothesis of a direct correlation.
• However, when focusing on individual animals, the research found that daily urinary creatinine excretion was constant over several days.
• This led to the discovery that urinary creatinine concentrations are related to urinary flow rates in a negative curvilinear fashion – as one increases, the other decreases.

Conclusion and Implications

• Urinary flow rates in young horses can be estimated from urinary creatinine concentrations, however, this estimation requires separate curves relating the two variables to be derived for each creature.
• Simply put, the relationship between urinary flow rate and creatinine concentration is not universally applicable across all the animals, requiring individual analysis for accurate interpretation.
• This research could have implications for veterinary practice particularly in monitoring the urinary health of young horses and possible indicators for renal health issues.