Figure 6.

(A) Mean FiO₂ at three O₂ flow rates (2 L min⁻¹, 4 L min⁻¹, and 6 L min⁻¹) for the ventilators with low-pressure O₂ supply, depicted over the last 30 s of steady state. (B) Measured ΔFiO₂ in the Hamilton T1 and HEV (high-pressure port) to the set FiO₂ concentrations in the UI (0.40, 0.60, 0.80 and 1.00). The measured ΔFiO₂ with an FiO₂ setting of 1.00 in the UI is indicated by ^*. The error bars indicate the fluctuation (minimum and maximum) observed at steady state. (C) Achieved FiO₂, and t₉₀ values at an O₂ flow rate of 12 L/min (low pressure) or at a set O₂ concentration of 100% (high pressure) of each ventilator.