Figure 3. Plasma cholinesterase activity (expressed as a percentage of baseline) over time after discontinuation of a 90-min mivacurium infusion and administration of neostigmine. Solid circles = the results from the spontaneous recovery group; open circles = those from neostigmine group. At time zero, both groups have plasma cholinesterase activity at 100% of baseline. Plasma cholinesterase activity was decreased significantly to 7% of baseline values 2 min after discontinuation of the infusion and had increased to only 45% of baseline values 90 min after discontinuation of the infusion (89 min after administration of anticholinesterase).