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1 April 1983 IMMOBILIZATION OF POLAR BEARS WITH CARFENTANIL
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Abstract

Sixty-four free-ranging polar bears (Ursus maritimus) were immobilized using carfentanil at doses ranging from 1.0–38.0 μg/kg (mean 20 ± 8 μg/kg). Induction was rapid (5.0 min) (n = 46) and the bears showed good muscle relaxation. Respiratory rate was depressed (mean 3.8 bpm). The mean arousal after the administration of narcotic antagonists was longer than 5 min. Recurrence of narcotic effects—so called recycling—was seen in some bears and in a separate black bear trial was consistently observed in animals given doses of 10 μg/kg or more of carfentanil. The rapid induction, low drug volume and excellent muscle relaxation related to carfentanil immobilization make this a potentially useful drug for polar bear immobilization.

Haigh, Lee, and Schweinsburg: IMMOBILIZATION OF POLAR BEARS WITH CARFENTANIL
J. C. Haigh, L. J. Lee, and R. E. Schweinsburg "IMMOBILIZATION OF POLAR BEARS WITH CARFENTANIL," Journal of Wildlife Diseases 19(2), (1 April 1983). https://doi.org/10.7589/0090-3558-19.2.140
Received: 7 September 1982; Published: 1 April 1983
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