Flow, volume, and airway pressure waveforms are valuable real-time tools in identifying various aspects of patient-ventilator interaction.

Our study shows that LU has a significant impact on decision making and therapeutic management.

Trigger variableThe trigger variable is usually pressure or¯ow. 51 With pressure triggering, in order to trigger the ventilator and initiate the inspiratory¯ow, the patient must decrease the pressure in the ventilator circuit to a preset value, which will then open a demand valve. With¯ow triggering, the patient triggers the ventilator when the respiratory muscles generate a certain preset inspiratory¯ow. 51 With pressure triggering, the inspiratory muscles contract isometrically, and with¯ow