Influência da lidocaína ou da dextrocetamina pela via intratesticular na anestesia com sevoflurano em cães submetidos à orquiectomia eletiva

Abstract

The objective was to evaluate the cardiovascular and respiratory variables as well as the analgesia produced by intratesticularly block with dextrocetamina or lidocaine, besides the evaluation of high and post-anesthesia in dogs undergoing elective orchiectomy under inhalation anesthesia with sevoflurane. 16 animals, clinically healthy based on the results of clinical and hematological tests were used. The animals were divided randomly into two groups in which was administered intratesticularly 2% lidocaine at a dose of 1 mg/kg (GL) and dextrocetamina 5% at a dose of 2.5 mg/kg (GC). In both groups the dogs were induced with propofol administered to effect and maintained with 1,7V% sevoflurane diluted in 100% oxygen administered through calibrated vaporizer and appropriate anesthetic system based on the animal's weight. After induction, is waited for 10 minutes for stabilization of exhaled anesthetic concentration and administered by one of the treatments intratesticularly. Five minutes from the local block started the surgical procedure lasting 15 minutes. We evaluated the heart rate (HR), respiratory rate (RR), systolic arterial pressure (SAP), diastolic arterial pressure (DAP), mean arterial pressure (MAP), oxygen saturation of hemoglobin (SpO2), partial pressure of gas carbon dioxide (EtCO2) and sevoflurane (EtSevo) breath, body temperature (TºC) prior to administration of the treatments intratesticularly and the specific surgical time, as well as trans-operative analgesia, and the evaluation of discharge and recovery post-anesthetic. There were no statistically significant differences between time and groups in the variables studied. It can be concluded that both drugs are used individually, produce adequate analgesia and respiratory and cardiovascular stability permitting elective orchiectomy in dogs.