Fig. 1. The transition of propofol concentrations during nephrectomy. T1 and T2 represent 1 h and 2 h from the beginning of the infusion, respectively. T3 represents a mean of 2.47 ± 0.34 h (mean ± SD) at the time of ligation of renal vein. T4 and T5 represent 1 h and 2 h from the time of ligation of renal vein, respectively. T3 and T5 were assumed to be the steady state before and after nephrectomy, respectively.