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Sequential changes of PaO2 according to positioning during partial liquid ventilation (PLV). Base, baseline; Injury, 1hr after induction of injury; S1, PLV in the supine position; P1, 1hr after PLV in the prone position; P2, 2hrs after PLV in the prone position; P3, 3hrs after PLV in the prone position; S2, PLV in the supine position after the prone position.*p<0.05 compared with Injury, †p<0.05 compared with previous value.
