This work aimed at comparing the anaesthetic inductive effects among drugs such as propofol, etomidate and tiopental as well as the epidural anaesthesia with lidocaine following direct induction in bitches undergone caesarian section and their puppies. For so, 20 bitches and 129 puppies were used and distributed in four groups. group 1 (5 bitches and 39 puppies) the anaesthetic induction was made by using propofol, in group 2 (5 bitches and 25 puppies) by using etomidate, in group 3 (5 bitches and 26 puppies) tiopental and in group 4 (5 groups and 39 puppies) epidural anaesthesia and halothane induction through mask. In all cases, the pre-anaesthetic medication was midazolam in doses of 0.22mg kg-1 via IM, and the anaesthetic maintance with halothane in semi-closed circuit and initial concentration of 3V%. The variables evaluated in the bitches were: rectal temperature, heart rate, breath rate, oxi-hemoglobine saturation (SpO2), and mean blood pressure. For the puppies evaluation, it was measured: heart rate, breath effort, muscular movements, mucus color and reflex irritability and also the SpO2. They were interpreted through the modified Apgar score. The results showed that all the protocols were adequate for the mothers with minimum system effects. For the puppies, the epidure anaesthesia usage following the induction and halothane maintance was superior to the protocols that had used injectable agents in the anaesthetic induction.
inductive drugs; foetal depression; surgery
