End-expiratory lung impedance (EELI)
The difference between two end-expiratory images at two freely selectable cursor positions C1 and C2 quantifies the global and regional changes in end-expiratory lung impedance (∆EELI). This impedance change is shown on the one hand by colors and on the other hand by numerical parameters. The global numerical value represents variations in global end-expiratory status at cursor positions C1 and C2 relative to the global tidal variation at C1. Regional deviations within the defined ROI are represented by the value ∆EELI ROI [The ∆EELI values were collected for the ventilation mode transitions PCV to PSV, PSV to SB and PCV to SB and the ∆EELV values were calculated. For this purpose, the ∆EELI value was multiplied by the measured tidal volume at the reference time (C1) (∆EELV = ∆EELI * TV 