Anestesia e analgesia em ressecção de timoma em cão – relato de caso

Abstract

Anesthesia for thoracic procedures requires a deep knowledge on the part of the anesthetist, not only of the drugs and their pharmacodynamic effects, but of the entire cardiorespiratory physiology and implications arising from the thoracic access and the necessary positive pressure ventilation. There is also concern about providing adequate analgesia, as these are surgeries involving severe trauma and, consequently, the pain is undeniable. A male, castrated, six-year-old Labrador Retriever canine was referred for thoracotomy at the HVU-UFSM in order to remove a neoplasm in the thymus. For MPA, the patient received an association of dexmedetomidine 1.5µ/kg and methadone 0.3mg/kg, IM. Anesthetic induction was performed with a bolus of fentanyl, lidocaine, ketamine followed by propofol. Anesthetic maintenance was performed with propofol in continuous infusion. For intraoperative analgesia, the drugs listed were ketamine, lidocaine, fentanyl and dexmedetomidine. The anesthetic protocol was assertive, as it delivered analgesia and provided hemodynamic stability, considering the complexity of the procedure and its possible intercurrences.