An Evaluation of End-Expiratory Lung Volume and Pulmonary Mechanics With Different PEEP Levels in Mechanical Ventilation in ARDS Patients

Before the measurement, a recruitment maneuver was performed for 30-40 s at a PEEP level of 20 cmH2O. At four different PEEP levels of 15, 10, 5, and 0 cmH2O, a decreasing PEEP trial was performed, and the measurement results were recorded.The measurement time at each PEEP level was chosen as 10 minutes. At the end of the measurement, static compliance was measured by applying an end-inspiratory pause. Respiratory system elastance,static strain volume gain was calculated.The estimated lung volume recovered was calculated using the formula ∆EELV - (∆PEEP x Compliance PEEPlow) and compared with the volume gain.