• J Vet Med A Physiol Pathol Clin Med · Sep 2001

    Recovery times and evaluation of clinical hemodynamic parameters of sevoflurane, isoflurane and halothane anaesthesia in mongrel dogs.

    • I Polis, F Gasthuys, L Van Ham, and H Laevens.
    • Department of Small Animal Medicine and Clinical Biology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium. ingeborgh.polis@rug.ac.be
    • J Vet Med A Physiol Pathol Clin Med. 2001 Sep 1;48(7):401-11.

    AbstractIn the present study the influence of three volatile agents (halothane, isoflurane and sevoflurane) in oxygen at two concentrations [1.5 and 2 minimum alveolar concentration (MAC)] on non-invasive cardio-respiratory parameters (heart and respirators rates, non-invasive blood pressures at 15, 30, 60 min and after extubation) and on the recovery times (appearance of the first eyelid reflex, emergence time) after clinical anaesthesia was studied. After premedication with fentanyl-droperidol (5 microg/kg and 0.25 mg/kg, intramuscularly) and induction with propofol (5 mg/kg, intravenously) six dogs were randomly anaesthetized for 1 h for a standard neurologic stimulation test. A wide individual variation in respiration rate (induced by an initial hyperpnea) was observed in the 1.5 MAC protocols, without significant differences. Heart rate was significantly lower during 1.5 and 2 MAC halothane when compared to isoflurane and sevoflurane. An increase from 1.5 to 2 MAC induced significant decreases in diastolic (DAP) and mean arterial blood pressure in all groups without significant changes in the systolic arterial pressures. Only DAP in sevoflurane protocol was significantly different at 1.5 and 2 MAC compared to halothane. Time had no significant influences in the non-invasive blood pressures in all protocols. Extubation induced a significant increase of all parameters in all protocols. The time for a first eyelid reflex was significantly longer after 2 MAC compared to the 1.5 MAC protocol. There was no significant difference between the three anaesthetic agents. Although emergence time was longest for halothane at both anaesthetic concentrations, no significant difference in emergence time was observed for the three volatile agents.

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