Cardiopulmonary Effects of Medetomidine and Ketamine in the Gopher Tortoise (Gopherus polyphemus)
American Association of Zoo Veterinarians Conference 2000
Patricia M. Dennis, MSL, DVM; Darryl J. Heard, BSc, BVMS, PhD; Jeffrey S. Davidson
Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA


Six healthy adult gopher tortoises (Gopherus polyphemus) were used to determine selected cardiopulmonary effects of intravenous medetomidine and ketamine. Prior to the commencement of this study, carotid and jugular catheters were surgically placed in each animal, for blood collection, direct arterial blood pressure monitoring, and drug administration. Baseline heart rate, direct carotid arterial blood pressure, and body temperature were measured before drug administration, then every 5 min after intravenous injection of medetomidine (100 µg/kg) and ketamine (5 mg/kg). All tortoises were maintained under anesthesia for 30 min, then the effects of medetomidine were reversed with atipamezole (100 µg/kg) administered intravenously. All variables were monitored every 5 min for 15 min following medetomidine reversal. Baseline arterial blood samples were collected before, and at 5, 15, 30 min post-medetomidine/ketamine administration, and 15 min post-atipamezole administration to determine blood pH, PaO2, and PaCO2. No significant change occurred in heart rate or body temperature. There was a significant increase in arterial blood pressure following administration of medetomidine/ketamine. There was a significant decrease in arterial blood pressure following administration of the reversal agent, atipamezole. There were also significant changes in blood gas parameters between immobilization and reversal.


Speaker Information
(click the speaker's name to view other papers and abstracts submitted by this speaker)

Patricia M. Dennis, MSL, DVM
Zoological Medicine Service
University of Florida
Gainesville, FL, USA

MAIN : All : Medetomidine & Ketamine in the Gopher Tortoise
Powered By VIN