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Temporal measures of gas exchange over 15 minutes following pressure or volume limited SI: A) Partial pressure of arterial (Pa) oxygen (PaO2), B) carbon dioxide (PaCO2), C) percentage of inspired oxygen (FiO2) and D) alveolar-arterial difference in oxygen (AaDO2) in pressure-limited (PressSI; black circles) and volume-limited (VolSI; open squares) sustained inflations. * p<0.05.
