Use of dexmedetomidine repeated subcutaneous administration for balanced anaesthesia in horses.
Authors: Rabbogliatti Vanessa, Amari Martina, Brioschi Federica Alessandra, Di Cesare Federica, Zani Davide Danilo, De Zani Donatella, Di Giancamillo Mauro, Cagnardi Petra, Ravasio Giuliano
Journal: BMC veterinary research
Summary
# Dexmedetomidine Subcutaneous Administration in Equine Anaesthesia Balanced anaesthetic protocols in equine practice rely on minimising inhalational agent requirements whilst maintaining cardiovascular stability and analgesia; alpha-2-agonists such as dexmedetomidine are valuable for this purpose, though their optimal delivery route remains unclear. Rabbogliatti and colleagues compared intravenous constant rate infusion (CRI) against repeated subcutaneous injections of dexmedetomidine in anaesthetized horses, evaluating cardiopulmonary parameters and recovery quality throughout and after surgical procedures. The subcutaneous approach produced a notably gentler haemodynamic profile compared with intravenous administration, with reduced initial cardiovascular perturbations whilst maintaining adequate sedation, analgesia and inhalational agent sparing. These findings suggest that repeated SC dexmedetomidine injections offer a practical alternative for practitioners seeking to improve anaesthetic balance with less pronounced blood pressure and heart rate fluctuations—particularly relevant for equine patients with compromised cardiovascular reserve. The subcutaneous route warrants consideration in clinical protocols where steady-state drug delivery and haemodynamic stability are priorities, though practitioners should verify dosing intervals and total dose equivalency relative to their current CRI practices.
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Practical Takeaways
- •Subcutaneous dexmedetomidine administration offers a viable alternative to IV infusion with potentially gentler effects on heart rate and blood pressure during surgical procedures
- •Using repeated SC dexmedetomidine injections as part of balanced anaesthesia may allow reduction in inhalational anaesthetic doses, potentially improving recovery quality
- •Consider subcutaneous dexmedetomidine for horses where minimizing cardiopulmonary stress during anaesthesia is a priority, particularly in high-risk or geriatric patients
Key Findings
- •Subcutaneous dexmedetomidine administration produces reduced haemodynamic impact compared to intravenous constant rate infusion in anaesthetized horses
- •Dexmedetomidine is adequately absorbed via subcutaneous route while maintaining sedative and analgesic effects
- •Subcutaneous dexmedetomidine may improve recovery quality in horses undergoing general anaesthesia
- •Alpha-2-agonists reduce inhalational anaesthetic requirements when used as part of balanced anaesthetic protocols