Abstract
Total intravenous anesthesia (TIVA) using 1% guaifenesin-0.2% ketamine-0.005% xylazine (GKX) was applied to 9 clinically healthy cows which were premedicated with 0.02mg/kg IV atropine followed by 0.05 mg/kg IV and 0.05mg/kg IM xylazine. Anesthesia was induced by 0.5mg/kg IV ketamine and maintained for 60min by continous intravenous injection of GKX in 6 cases after recumbent, while 0.2% ketamine was injected in 3 control cases. At the end of anesthesia, 3 cases anesthetized with GKX were intravenously injected with atipamezole at a dose of 0.25mg/mg of the total xylazine injected, and control cases were antagonized by 1.0mg/kg IV trazoline. The mean total consumption of TIVA solution was 4.6ml/kg/hr in the GKX group while 8.8ml/kg/hr in the control group. During anesthesia, the acceptable heart rate and arterial blood pressure were maintained, although respiratory acidosis and hypoxemia were observed in both groups. The mean standing-up times after anesthesia in the GKX group were 9 and 63min with and without atipamezole, respectively, while 30min in the control group.
