Comparative Evaluation of Cardiac Effects of Atropinesulfate as a Premedication for Two Anesthetic Protocolin Terrier Dogs

Since atropine has parasympatholytic effects and it has some interactions with the other premedications,anesthetic drugs and surgical procedures, recorded data’s of capnography and pulse-oximetery, were evaluatedduring ovariohystrectomy. Twenty female terriers with 6.3±0.7 kg weight and 34± 9 month selected and randomlydivided in four groups.Group one received acepromazine as premedication, ketamin + diazepam as induction and intravenous ketamineas maintenance.Group two received additional atropine as premedication and In group three, maintenance ofanesthesia were performed by halothane inhalation. Other procedures were the same as group one. All of theanesthetic procedures in group four were the same as group three except the subcutaneous administration ofatropine was performed as a premedication.Duration of anesthesia as well as quality and duration of recovery were recorded. HbO2 saturation, ETCO2,heart rate, respiratory rate and rhythm were recorded in specific intervals from one hour prior to anesthesia to threehours after extubation.Data had been analyzed based on anesthesia phase, painful surgical procedure, and recovery phase. MostTachycardia had been noticed in group two during painful surgical phase, and hypoventilation occurred in groupthree more than the other groups.According to our findings, as ketamine induces tachycardia, and halothane depresses myocardium, using atropineas a premedication drug seems not to be necessary in this particular surgical procedure.