Protocolo de anestesia total intravenosa (tiva) por infusão contínua de propofol, associado ao fentanil, lidocaína e cetamina (flk), em cirurgia de castração em cão: relato de caso

Abstract

Elective castration in dogs and cats, through ovariohysterectomy surgeries in females and orchiectomy in males, is routine practice in Brazil for population control and animal welfare generation. Among the different anesthetic ducts used to allow the surgical approach, the technique of total intravenous anesthesia (TIVA) is included. This modality has been successfully applied mainly through the associated infusion of propofol, which guarantees good anesthetic planes with little cumulative effect, with agents that suppress the absence of analgesia of this drug, such as opioids, N-methyl D-Aspartate antagonists, local anesthetics and α 2 adrenergic agonists. We report the application of an intravenous total anesthesia protocol in the maintenance of anesthesia and analgesia supply in a Border Collie dog that was admitted to the University Hospital of Veterinary Medicine of the Federal University of the Recôncavo of Bahia for elective castration procedure. The patient received acepromazine maleate (0.05 mg / kg) and ketamine hydrochloride (3 mg / kg) administered intramuscularly as a preanesthetic medication, was induced 15 minutes later with 4 mg / kg propofol followed of fentanyl bolus (5 μg / kg) intravenously and maintained in anesthetic plane with continuous infusion of propofol (0.4 mg / kg / m), plus fentanyl (3.5 μg / kg / min), ketamine (10 μg / kg / min) and lidocaine (50 μg / kg / min). Parametric stability was noted throughout the procedure, with no significant intercurrences or signs of hyperalgesia in the trans-surgical and immediate postoperative periods, where the patient presented a smooth and satisfactory recovery.