In this study we aimed to evaluate a new system dedicated to estimate the end expiratory lung volume, by measuring the VO2-VCO2, during mechanical ventilation compared to the Helium dilution technique and the CT scan. We will compare the data considering the CT scan data as the gold standard.
In this study the investigators aim to evaluate a new system dedicated to estimate the end expiratory lung volume, by measuring the VO2-VCO2, during mechanical ventilation compared to the helium dilution technique and the computed tomography (CT) scan.