How Early Cycling Leads to Double Trigger

In this pressure support mode, all breaths are patient-triggered. During the expiratory phase (in the first breath), an upward deflection appears on the flow-time scalar, indicating that the patient's inspiratory effort persists beyond the end of mechanical inflation - suggesting early cycling. When this ongoing effort is strong enough (remaining breaths), it can trigger another breath during exhalation, resulting in a double trigger. This dyssynchrony can be corrected by prolonging the inspiratory time, achieved by reducing the end-inspiratory flow cycling percentage.