The aim this study was to compare the clinical effects of induction with propofol in lipid emulsion and nanoemulsion in cats after repeated administrations. Twelve healthy mongrel cats, with an average weight of 2.9±0.6kg, were randomly distributed into two groups: NANO (n=6) and EMU (n=6), who received propofol in nanoemulsion at dose of 9.5mg kg-1 and in lipid emulsion at a dose of 10mg kg-1, respectively, both intravenously for five consecutive days. Blood count and kidney and liver function were performed every 24 hours until 168 hours after the first induction. The clinical parameters of heart rate (HR), respiratory rate (RR) and rectal temperature (RT) were evaluated before treatment and 5, 10, 20 and 30 minutes after administration of propofol. At baseline, there was a decrease in HR in the EMU until the 3rd day and RR and RT in both groups until the last day, with no difference between days. The enzymes ALT and ALP decreased after 24 to 96 hours and 48 to 144 hours, respectively in EMU group. The values of blood count decreased until the fifth day in both groups. The times of hypnosis, extubation and sternal recumbency did not differ between groups and between days. The total recovery time of EMU group was higher in the 4th and 5th day in relation to the 1st. Concludes that the induction with propofol is safe and that propofol in lipid emulsion has a higher cumulative effect after repeated administration in cats.
anesthesia; cumulative effect; cats; nanoemulsion; propofol
