Esophageal Balloon Calibration in Assisted Ventilation Mode

"After definitive catheter positioning, esophageal balloon calibration will be performed in:~1. volume-controlled mode with tidal volume set to obtain 6-8 lm/kg of ideal body weight (reference),~2. pressure support ventilation (PSV) with support set to obtain a tidal volume ranging between 6-8 ml/kg of ideal body weight at equal PEEP of volume control mode (PSV baseline);~3. PSV + sigh ventilation (sigh setting: total inspiratory pressure equal to 35 cmH2O at a rate of 1/ minute; inspiratory time equal to 4 seconds)."