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1 December 2018 REPEATED ANESTHESIA IN A BLACK RHINOCEROS (DICEROS BICORNIS) TO MANAGE UPPER RESPIRATORY OBSTRUCTION
Abstract

This report describes weekly repeated anesthesia in a 7-yr-old, 1,030 kg, female Eastern black rhinoceros (Diceros bicornis michaeli), that was immobilized six times using a combination of 2 mg etorphine (0.002 mg/kg), 5 mg medetomidine (0.005 mg/kg), 25 mg midazolam (0.024 mg/kg), and 300 mg ketamine (0.29 mg/kg) delivered intramuscularly (IM) via remote dart to facilitate long-term medical care of a bilateral, obstructive Actinomyces sp. rhinitis. The drug combination described in this study resulted in reliable, rapid recumbency of the animal within 2–8 min after initial administration via dart and produced deep anesthesia for 34–78 min without supplemental anesthetic administration. Antagonist drugs (100 mg naltrexone [0.1 mg/kg] and 25 mg atipamezole [0.024 mg/kg] IM) produced reliable and uneventful recoveries in all the procedures. During each anesthetic procedure, the animal was intubated and provided intermittent positive pressure ventilation with a megavertebrate demand ventilator. Tachycardia and hypoxia noted after induction resolved after positive pressure ventilation with oxygen. This report provides useful information on a novel anesthetic protocol used repeatedly for intensive medical management in a black rhinoceros.

Copyright 2018 by American Association of Zoo Veterinarians
"REPEATED ANESTHESIA IN A BLACK RHINOCEROS (DICEROS BICORNIS) TO MANAGE UPPER RESPIRATORY OBSTRUCTION," Journal of Zoo and Wildlife Medicine 49(4), 1041-1046, (1 December 2018). https://doi.org/10.1638/2018-0095.1
Accepted: 23 August 2018; Published: 1 December 2018
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