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Calculated values of arterial oxygen saturation based on data obtained under conditions of exercise and hypoxia from a number of studies based on estimated values of lung diffusing capacity. Regression lines (dashed) shown compared to lines of identity. Panel A (Morphometric method): DLO2 = 158 ml O2 min−1 mmHg−1; Panel B (Present model): DLO2 = 102 ml O2 min−1 mmHg−1; Panel C (Optimal DL): DLO2 = 74 ml O2 min−1 mmHg−1.
