Early Cycling in Pressure Support Mode

In pressure support mode, early cycling dyssynchrony can be recognized on the flow–time scalar by an upward deflection at the start of expiration. This indicates that the patient’s neural inspiratory effort continues even after the ventilator has ended the mechanical inspiration.

The dyssynchrony can be corrected by reducing the flow termination criterion (expiratory trigger sensitivity) to a lower percentage, thereby prolonging the inspiratory phase and better matching it with the patient’s neural inspiratory time.