Effect of Aerosolised Salbutamol Administration on Arterial Potassium Concentration in Anaesthetised Horses.

The study seeks to evaluate the effects of aerosolized salbutamol, a medication used to manage breathing-related issues, on the potassium levels in the blood of healthy horses that are under anesthesia for elective surgeries. The results show that there was a significant reduction in potassium levels, particularly in horses treated with aerosolized salbutamol.

Overview of Methodology

• The researchers reviewed anesthetic records from healthy adult horses undergoing elective surgery over a three-year period. The data included arterial electrolyte (sodium, potassium, chloride, and calcium) concentration measurements from these horses.
• Any records where intra-operative electrolyte supplementation, antimicrobial administration, or noncrystalloid fluid administration were documented were excluded from the study. Also, cases where salbutamol was administered prior to electrolyte measurement were not considered.
• A total of 60 records meeting the above criteria were used. The horses were divided into two groups based on whether they received aerosolized salbutamol (dosage of 2μg per kg body weight) after baseline electrolyte measurement and before the second one. Group S comprised horses that received the treatment, while Group NS comprised those that did not.

Findings of the Study

• The study found that there was a significant reduction in the concentration of potassium and calcium between the baseline and the second electrolyte measurement in both groups.
• However, the reduction in potassium concentration was significantly greater in the horses that received aerosolized salbutamol (Group S), a reduction of 12.3%, compared to those that did not (Group NS), where the reduction was 6.9%. The findings therefore suggest that the administration of aerosolized salbutamol resulted in a more pronounced decrease of potassium levels.
• The study also found that the decrease in potassium levels was significantly linked to the administration of salbutamol.

Implications of the Study

• This study highlights the importance of monitoring potassium levels in horses undergoing anesthesia, especially those that receive aerosolized salbutamol, as the administration of this drug can further reduce potassium levels.
• The researchers suggest that future investigations could delve into understanding the mechanisms through which aerosolized salbutamol influences electrolyte balances, and the impacts of these changes on the health of the horses. This knowledge could help in better management of horses under anesthesia, particularly in minimizing any risks related to drastic reductions in potassium levels.