Monitoring lung impedance changes during long-term ventilator-induced lung injury ventilation using electrical impedance tomography.

The target of this methodological evaluation was the feasibility of long-term monitoring of changes in lung conditions by time-difference electrical impedance tomography (tdEIT). In contrast to ventilation monitoring by tdEIT, the monitoring of end-expiratory (EELIC) or end-inspiratory (EILIC) lung impedance change always requires a reference measurement. To determine the stability of the used Pulmovista 500 The EELIC was between -0.07 Ωm day The observed shifts started earlier for higher PEEP levels. Changes of EELI could be precisely monitored over a period of 48 h by tdEIT on pigs.