• Y Hikasa, T Yoshikai, K Takase, and S Ogasawara.
• Department of Veterinary Medicine, Faculty of Agriculture, Tottori University.
• Zentralbl Veterinarmed A. 1997 Sep 1;44(7):427-42.

AbstractThe clinical, cardiopulmonary, haematologic, and serum biochemical effects of sevoflurane, isoflurane and halothane anaesthesia with 66% nitrous oxide, were compared in healthy, premedicated cats breathing spontaneously during 6 h of anaesthesia. Recovery time from anaesthesia with sevoflurane-nitrous oxide was more rapid than that with halothane-nitrous oxide, but it does not differ from that with isoflurane-nitrous oxide. The degree of respiratory acidosis with sevoflurane-nitrous oxide anaesthesia was similar to that with isoflurane-nitrous oxide and was less than that with halothane-nitrous oxide. There were no significant differences among the groups in the heart rate, arterial pressures, haematological and serum biochemical values. The three anaesthetic regimens induced a similar degree of hyperglycemia during anaesthesia. Serum biochemical examination did not reveal apparent hepatic or renal injuries after each anaesthesia. Time-related increases in respiration rate and arterial carbon dioxide partial pressure were observed during prolonged halothane-nitrous oxide anaesthesia. No significant time-related changes in cardiopulmonary variables were observed during either sevoflurane- or isoflurane-nitrous oxide anaesthesia. Therefore, sevoflurane-nitrous oxide may be used as an effective and safe anaesthetic combination similar to isoflurane-nitrous oxide for long-term anaesthesia in healthy cats.

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