There was no significant reduction in propofol requirements after the administration of @ mg/kg lidocaine from @ g/ml -LSB- confidence interval ( CI ) @-@ @ -RSB- to @ g/ml ( CI @-@ @ ) ; however , a bolus of @ mg/kg lidocaine decreased the Cp@ value of propofol by @ % from @ g/ml ( CI @-@ @ ) to @ g/ml ( CI @-@ @ ) ( P < @ ) .