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. 2021 Mar 26;11:6985. doi: 10.1038/s41598-021-86458-x

Figure 4.

Figure 4

Effects of fentanyl (75 μg/kg, IV) on peak inspiratory flow (top left panel), peak expiratory flow (top right panel), end inspiratory pause (middle left panel), end expiratory pause (middle right panel), and Rejection Index (bottom left panel) in rats pretreated with vehicle (VEH; 1 ml/kg, IV) or GSHee (100 μmol/kg, IV). The data are presented as mean ± SEM. There were 9 rats in each group. The stippled horizontal line denotes average resting values before injection of GSHee or vehicle.