Uso do Propofol associado a Metadona e bloqueio local com LidocaínA em seis exemplares de Potamotrygon sp.

Abstract

Fish make up the group of vertebrates with the greatest diversity, and their main characteristic is their aquatic habitat, with primary respiration through gills and ectothermy. The Potamotrygonidae family is an example of cartilaginous fish that includes freshwater rays belonging to South America. As they are restricted to fresh life, they have anatomophysiological particularities that differentiate them from other elasmobranchs. Potamotrygon is the most diverse genus, and although they are not aggressive fish, stingrays of this genus have a retro-serrated sting covered by a venom-producing glandular epithelium. Aiming at the safety of many fish that are protected, and of those responsible for management, this work aims to report the anesthetic protocol for iron resection from six stingrays of the genus Potamotrygon. Six specimens of stingray were sent to the Veterinary Hospital of the Federal University of Uberlândia (HVET-UFU), three of the species Potamotrygon falkneri and three Potamotrygon leopoldi for surgical removal of sting. The anesthetic protocol consisted of methadone induction of anesthesia with propofol in the spiracles, and local blockade with lidocaine without vasoconstrictor. Trans-anesthetic monitoring was performed regarding water temperature, respiratory rate, and heart rate of the animals. All animals were recovered under anesthesia within five minutes, and no complications were recorded. Although the anesthesiology of elasmobranch fish is still an uncertain area due to the scarcity of experimental models, the launched protocol presented extraordinary results for promoting relaxation, analgesia and rapid recovery.