Evaluation of effect of halothane anesthesia on the recovery time in Iranian Bakhtyari tailed sheep

Effect of fat-tail on recovery times in halothane-induced anesthesia, in fat-tailed Bakhtiyari sheep were studied. The study was done in tow steps (Two study group: sheep with unligated median sacral artery (MSA) and those with ligated MSAL). In this study, eight 10-12 month old, fat-tailed Bakhtiyari ewe lamps were anesthetized twice with a two-week interval. In the first step, anesthesia was induced using a facemask applying halothane and oxygen. The anesthesia was maintained for 3 hr after intubation (control group). Anesthesia induction time, extubation time, time to sternal recumbency and time of standing up were recorded carefully during and after anesthesia. In the second step (two weeks later), MSA was ligated under epidural anesthesia prior to induction of general anesthesia which was carried out similar to that in the first step (MSAL experimental group). The extubation time, time to sternal recumbency and time of standing up were significantly longer in the control groups compared to those in the experimental group. Therefore, it can be concluded that fat-tail affects the metabolism and solubility of halothane. Furthermore, due to the high solubility and metabolism rate of this anesthetic, it is not suitable to be used for overweight/obese patients.