Analgesic Effect of 4 Protocols of Epidural Anaesthesia in Canines Undergoing Routine Ovariohisterectomy

Abstract

Analgesic effect of 4 protocols of epidural anesthesia was studied in 20 canine undergoing routine ovariohysterectomy, ASA I and II, without distinction of race and age. Animals were divided into 4 groups of equal number: Group 1: Lidocaine 1% Morphine, Bupivacaine 0.125% Group 2: Morphine, Bupivacaine 0.125% Group 3: and Group 4-Fentanilo Lidocaine 1%-Fentanilo, respecting the period of latency of both drugs. Heart rate (HR / minute, every 5 minutes) were considered for the assessment of intraoperative surgical stimulus, and in the postoperative period was used indicators of the scale of assessment of pain at the University of Melbourne (Otero, 2012) every 15 minutes for the first hour, then every 30 minutes (2nd hour) and finally every 60 minutes, evaluating patients in the morphine group 10 hours (totaling 12 hours) and fentanyl for 6 hours (total of 8 hours). They were found mathematical variations of intraoperative heart rate, and the results of the scale of Melbourne yielded low intensity pain in all patients. Statistically, results showed no significant differences (p> 0.05) regarding the variable of the analgesic effects of both protocols.