Fig. 2 (abstract P361).

Shunt as a function of FiO₂ for all patients. At FiO₂ 0.21 measurements were performed in 7 patients to ensure adequate saturation. At FiO₂ ≥ 0.3 all patients were measured. Median, interquartile range and minimum/maximum are shown for every FiO₂. Significant differences (P < 0.05) between FiO₂ levels are denoted as following: caret (^) denotes the significant difference between FiO₂ 0.3 compared to 0.4 and 0.6, bullet (•) denotes the significant difference between FiO₂ 0.4 to 0.21, 0.3 and 1.0 and finally, asterisks (*) denote the significant differences between FiO₂ 0.5 and 0.6 compared to 1.0