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Comparative cardiopulmonary effects of halothane and isoflurane in galahs (Eolophus roseicapillus)

Jaensch, S.M., Cullen, L. and Raidal, S.R. (1999) Comparative cardiopulmonary effects of halothane and isoflurane in galahs (Eolophus roseicapillus). Journal of Avian Medicine and Surgery, 13 (1). pp. 15-22.

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Ten galahs (Eolophus roseicapillus) were anesthetized twice with isoflurane and twice with halothane. For anesthetic induction, either isoflurane or halothane was administered by mask attached to a T-piece circuit. For maintenance, the same volatile agent was administered by mask or by endotracheal tube. Anesthesia was maintained for 60 minutes in all birds. Data were collected immediately postinduction (0 to 5 minutes of anesthesia), and comprised respiratory rate, heart rate, electrocardiogram (ECG), cloacal temperature, and venous blood gas analysis. The same measurements were then recorded at 10, 20, 30, 40, 50, and 60 minutes of anesthesia, with the exception of venous blood gas analysis, which was recorded at 20, 40, and 60 minutes of anesthesia. Both halothane and isoflurane resulted in significant (P < .05) respiratory and cardiac depression. The degree of depression was more severe with mask administration than with endotracheal tube administration of each agent. Hypothermia, hypercapnia, and ECG abnormalities were more marked with halothane than with isoflurane. We conclude that isoflurane is preferable to halothane for inhalant anesthesia in galahs, and mask administration of isoflurane is preferable to endotracheal administration of halothane.

Item Type: Journal Article
Murdoch Affiliation(s): School of Veterinary and Biomedical Sciences
Publisher: Association of Avian Veterinarians
Copyright: © 1999 by the Association of Avian Veterinarians.
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