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Fig. 1 | Critical Care

Fig. 1

From: Dynamics of end expiratory lung volume after changing positive end-expiratory pressure in acute respiratory distress syndrome patients

Fig. 1

Measurement of the dynamics of the end-expiratory lung volume change (ΔEELV) after an increase in positive end-expiratory pressure (PEEP). Left panel displays the volume waveform for each breath following the increase in PEEP. The difference between inspired and expired tidal volumes (VT) was calculated and corrected by the volume offset. Right panel displays the dynamics of ΔEELV after the increase in PEEP. The difference between inspired and expired tidal volumes was reported breath by breath. The gray line is the expected increase in volume (VEXP) required to distend already open alveoli (calculated as the product of respiratory system compliance of the previous PEEP level by ΔPEEP), and the black line is the additional volume (VADI). The number of breaths needed to reach 95 % of VADI was measured

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