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Wasted Efforts due to Low Trigger Sensitivity: Ineffective Triggering

Wasted efforts due to low trigger sensitivity are a type of ineffective triggering that occurs when the patient’s inspiratory effort is not strong enough to overcome the threshold set by the ventilator and fails to trigger a mechanical breath. Wasted efforts can increase the energy expenditure and fatigue of the respiratory muscles and cause patient-ventilator dyssynchrony. Wasted efforts can be detected by observing a drop in airway pressure and a decrease in flow during the expiratory phase that are not followed by a ventilator cycle.