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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), 140-144, (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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