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Point of minimal driving pressure depends on tidal volume used in PEEP trial. Plotted markers are measured driving pressure at each PEEP level for a given tidal volume. Marker shapes coded by stress index, and superimposed loess lines show estimated driving pressure over the range of PEEP by tidal volume. Corresponding vertical lines indicate the PEEP selected by ART protocol for a given tidal volume. PBW predicted body weight, PEEP positive end-expiratory pressure
