Evalution of hormonal metabolic and cardiorespiratory effects of medetomidine in one humped camels /

Document Type : Original Articles

Abstract

his study was aimed to evaluate file effects of alpha 2-adrenoceptor agonist medetomidine on sorne hormonal, metalJolic and cardiorespiratory responses in healthu one humped camels . Five apparently healthy male camels ageing 3-4 years . weighing 220-
280 kg were used . Tfte experiment was designed to invesligale lite physiological effects of different intravenous doses of medetomidine ( 20, 30 and 40 pg IKg ) . All ani­mals were treated with each dose with an interval of orie week and each animal served as control ( zero line J before inject ion . PhLJsiologicalfindings heart rate, respira­ tory rate. rectal body temperature and electrocardiogram were monitored pre- and post­ iryection of medetomidine after 5, 30,60 and 120 min . Complete hematological chang­ es were measured pre- and post-injection . Both blood glucose and insulin level were estimated . Cortisol was measured bu single antibody radioimmunoassau ( RIA J tech- 1tique . Medelomidi1te suppressed insulin secretion a1td induces inilinl lt!J1JOgl!Jcc111in fallowed by increased blood glucose levels . The hyperglycemic effects of medelomidine was not dose- dependent . There was non significant changes in hematological events. Plasma cortisol levels were sltowed non significant increases willtln dose 20 11g/ leg body weight while there was significant increases with dose 30 and 40 Jig / leg.• Body temperature was moderatelu decreased . Tlte heart rate was showed a bradycardia with irregular rhythm, and decreases the conduction in the conductive system of the heart.affected T waves. The respiratory rate was affected will t an initial slowing for few seconds to 1-2 min. post-injection. and increasing to normal within 120 min.It could be concluded that healthy camels can usually compensate for these physio­ logical changes during sedation and analgesia; however medetomidine are contraindi­ cated in cardiovascular and respiratory diseased camels. Moreover. animal ECG must be applied before pre anaethetic medication or anesthesia in order to prevent the sud­ den death of lite animals during anesthesia spedally in large animals as camels.

Main Subjects