Figure 3
Example of fresh gas flow management by the Zeus ® and resulting inspired O 2 (F I O 2 ), end-expired N 2 O (F A N 2 O), and N 2 (F I N 2 ) concentrations. Note how during automated administration the FGF of O2 and N2O (right Y-axis, logarithmic scale) is increased whenever FIN2 increases above a threshold value of approximately 15% (grey arrows).