Reversible immobilization of giant otters (pteronura brasiliensis) using medetomidineketamine and atipamezole

Sbastien H. Bauquier, Keith C. Hinshaw, Donna M. Ialeggio, Christopher L. Montgomery, Sandra Z. Perkowski

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


This communication reports a partially reversible chemical immobilization protocol used for translocation and veterinary care in giant otter (Pteronura brasiliensis; GO). Six GOs (three males and three females) weighing 24.8 ± 4.0 kg (mean ± SD) and ranging in age from 16 to 42 mo old were anesthetized with an i.m. combination of medetomidine (29 ± 3 g/kg) and ketamine (3.9 ± 0.4 mg/kg). To perform all procedures, two otters required an additional dose of ketamine (1.5 mg/kg). Anesthesia was reversed with atipamezole i.m. (147 ± 14 mg/kg). The mean induction time and recovery times were 12 ± 5 and 4 min (range, 09 min), respectively, with an anesthesia time of 47 ± 16 min. According to these results, the combination of medetomidine (30 g/kg i.m.) and ketamine (4 mg/kg i.m.) is a reasonable choice for inducing anesthesia in GOs.

Original languageEnglish
Pages (from-to)346-349
Number of pages4
JournalJournal of Zoo and Wildlife Medicine
Issue number2
StatePublished - 2010


  • Anesthesia
  • Chemical immobilization
  • Giant otter
  • Ketamine
  • Medetomidine
  • Pteronura brasiliensis

ASJC Scopus subject areas

  • Animal Science and Zoology
  • General Veterinary


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