Evaluation of Medetomidine Alone or in Combination with Tramadol on Tear Secretion in Cats and Their Reversal with Atipamezole
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Cat, Medetomidine, Schirmer tear test, Tear secretion, TramadolAbstract
To assess the effect of administration of medetomidine alone or in combination with tramadol on tear secretion (TS) in cats as well as their reversal with atipamezole. For the purpose of the study, a total of 46 cats, representing different breeds and genders, were selected and divided into two groups using a random assignment method. Group M was administered medetomidine at a dose of 80 µg/kg intramuscularly. Group MT was given a combination of medetomidine and tramadol at doses of 80 µg/kg and 2 mg/kg intramuscularly, respectively. Tear secretion was measured using Schirmer tear test I before sedation and at 15 (T15) - 60 (T60) minutes post-sedation with 15 min intervals. At 30 minutes, all cats were given atipamezole (200 µg/kg IM). TS statistically decreased until T30 measurement in both groups (P < 0.05). The TS decreased more in MT group compared to M group at T30 measurements (P < 0.05). TS increased in both groups post-atipamezole but didn't return to initial (T0) levels by study end (T60). Premedication with tear protectors or artificial tears is advised when using MT and M group agents in cats, and atipamezole can reverse their effects post-procedure.
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