Figure 2. Individual changes in plasma norepinephrine and epinephrine concentrations from baseline (0 min) in 11 desflurane-treated (left) and in 12 sevoflurane-treated patients (right), solid lines and filled symbols denote patients with an initial (from 0 to 5 min) increase in concentrations, whereas dotted lines and white symbols indicate no change or decrease in catecholamine concentrations.