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Am J Vet Res. 1990 Jul;51(7):1071-4.

Determination of a sedative dose and influence of midazolam on cardiopulmonary function in Canada geese.

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Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Canada.


Midazolam HCl (1.0 or 2.0 mg/kg of body weight) was administered IM to 6 Canada geese to determine a sedative dose that would allow positioning for radiologic examination. The effects of both test doses on cardiopulmonary function were evaluated at 5, 10, 15, 20, 30, and 40 minutes after drug administration and were compared with 2 end-tidal isoflurane concentrations (1.5 and 2.5%). The 2.0 mg/kg dosage induced moderate sedation at 15 and 20 minutes; sedation was adequate for positioning the geese. Sedation induced by the 1.0 mg/kg dosage was inadequate. The effects of both test doses on blood pressure, heart rate, and temperature were not significantly different from each other and from baseline data. Respiratory rate increased significantly (P less than 0.05) at 10, 15, 20, and 30 minutes with the 2.0 mg/kg dosage, and at 15 and 20 minutes with the 1.0 mg/kg dosage. Blood pressure and respiratory rate were significantly (P less than 0.05) decreased with isoflurane when compared with baseline data and the midazolam test doses. The results of this study indicate that midazolam at a dosage of 2.0 mg/kg induces adequate sedation with minimal cardiopulmonary changes, and, as an alternative to general anesthesia with isoflurane, provides a satisfactory level of restraint for radiography.

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