Comparison of pentazocine, butorphanol and dipyrone in glycopyrrolate-xylazine-ketamine anaesthetic combinations for diaphragmatic herniorrhaphy in buffaloes

Clinical study was done to compare effects of pentazocine (group I), butorphanol (group II) and dipyrone (group III) in anaesthetic combinations in 18 buffaloes undergoing diaphragmatic herniorrhaphy. In all the groups, rectal temperature, heart rate and respiratory rate fluctuated nonsignificantly during the entire period of observations. Spontaneous activity decreased and ataxia was observed in all the animals after xylazine administration. Anaesthetic induction was marked by relaxation of laryngeal muscles, jaw muscles and tail. Palpebral and pharyngeal reflexes were abolished soon after induction of anaesthesia in all the animals. Comparatively, anaesthesia achieved was of longer duration in group I (81.5±5.60 min), intermediate in group II (66.83±4.05) and shorter in group III (58.66±3.29 min). Based on various parameters, it was concluded that butorphanol and pentazocine had comparable analgesic effects in combination of glycopyrrolate-xylazine-ketamine during peri- and postoperative period in buffaloes undergoing diaphragmatic herniorrhaphy. Butorphanol and pentazocine were considered as better analgesics than dipyrone in these cases.