Renal tubular acidosis in horses (1980-1999).

This research study focuses on the occurrence and treatment of Renal Tubular Acidosis (RTA) in horses. RTA is a condition that affects the normal functioning of the kidneys, leading to hyperchloremic metabolic acidosis. The study was carried out on 16 horses with no specific breed or sex findings. The horses were frequently treated with large amounts of sodium bicarbonate, with the response being primarily dependent on the rate of administration.

Objectives and Methodology of the Study:

• The aim of the study was to analyze and describe the incidence of RTA in 16 equine subjects.
• The study did not identify any breed or sex-based preferences for the disease.
• The research did not point out any significant influence of diet on the development of the condition.
• The most common symptoms of RTA noted were depression, poor performance, weight loss, and anorexia.

Key Findings:

• Initial diagnosis revealed that all the horses suffered from a notable amount of hyperchloremic metabolic acidosis, while most showed a compensatory respiratory response.
• About 63% of horses showed signs of renal damage or disease, highlighting a strong correlation between RTA and kidney disorders.
• The chief treatment administered was large amounts of sodium bicarbonate, both intravenously and orally, to acutely correct acidosis.
• The effectiveness of this treatment was primarily tied to the rate of sodium bicarbonate administration.

Long-term Implications and Recurrence:

• To sustain normal acid-base status in horses, long-term oral supplementation with sodium bicarbonate turned out to be crucial.
• More than half of the subjects (56%) experienced RTA recurrence.
• Horses with signs of renal disease were more susceptible to experiencing multiple relapses.
• The study recommends considering RTA as a potential diagnosis in horses presenting with vague signs of depression, weight loss, and anorexia.

Summary:

• Overall, the study underscores the importance of early recognition and prompt treatment in managing RTA in horses.
• The precise cause of RTA in horses remains unclear, suggesting a need for further research.
• The suggested approach to successful management is aggressive intravenous sodium bicarbonate therapy at the onset, followed by long-term oral supplementation.