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Figure 1: PaO2 on OLV during PEEP0, PEEP5, and PEEP10. Average PaO2 values were as follows: PEEP 0 = 149 ± 80 mmHg, PEEP 5 = 144 ± 76 mmHg, PEEP 10 = 146 ± 78 mmHg. (a) PEEP responders (n = 12): increase in PaO2 of at least 20% from baseline. (b) Non-responders (n = 29): no increase in PaO2 of 20%, or a decrease in PaO2.

Figure 1: PaO<sub>2</sub> on OLV during PEEP0, PEEP5, and PEEP10. Average PaO<sub>2</sub> values were as follows: PEEP 0 = 149 ± 80 mmHg, PEEP 5 = 144 ± 76 mmHg, PEEP 10 = 146 ± 78 mmHg. (a) PEEP responders (<i>n</i> = 12): increase in PaO<sub>2</sub> of at least 20% from baseline. (b) Non-responders (<i>n</i> = 29): no increase in PaO<sub>2</sub> of 20%, or a decrease in PaO<sub>2</sub>.