Use of Heart-lung Interaction to Predict Haemodynamic Tolerance to the Open Lung Approach With Individualised PEEP

The tidal volume challenge is a fluid response test that consists of increasing the tidal volume from 6 ml/kg to 8 ml/kg for 1 minute and evaluating PPV. If PPV increases by more than 2%, it is considered positive, otherwise it will be negative.

The alveolar recruitment maneuver is a well-studied procedure to open the lung during invasive mechanical ventilation, allowing us to achieve the best PEEP for that lung, which is individualised PEEP.