Figure 2. (Top) Plasma concentration of the trans-trans isomer during recovery of neuromuscular function in the spontaneous and neostigmine-treated groups. The plasma concentrations are expressed as a percentage of the baseline concentration. The units on the x axis represent the time after discontinuation of the mivacurium infusion. Plasma concentrations of the trans-trans isomer are significantly higher in the neostigmine-treated group at 5, 6, 8, and 10 min after discontinuation of the mivacurium infusion. (Bottom) Plasma concentration of the cis-trans isomer during recovery of neuromuscular function in the spontaneous and neostigmine groups. There is no significant difference between groups. The plasma concentrations are expressed as a percentage of the baseline concentrations. The units on the x axis represent the time after discontinuation of the mivacurium infusion.