Figure 1

Lung overdistension by electrical impedance tomography in supine vs. prone body position. Line graphs of the electrical impedance tomography (EIT)-based estimations of lung overdistension from forty-two decremental positive end-expiratory pressure (PEEP) titrations—supine vs. prone body position—are shown (mean ± SEM). Some illustrative EIT images of overdistension from one mechanically ventilated patient with coronavirus disease (COVID-19)-induced acute respiratory distress syndrome (ARDS) are also shown: overdistended pixels in white. Note that prone body position increased lung overdistension in comparison with the supine one. Triangle up (white): supine body position. Triangle down (black): prone body position. X axis: decremental PEEP levels of the EIT-PEEP titrations. Y axis: percent of overdistended lung units out of the total lung imaged by EIT.