Table 1.

Asynchrony definitions for airway flow and pressure detection as described by Thille et al. [1], referred to as AI _Thille

Type of asynchrony	Definition
Ineffective triggering	An abrupt airway pressure drop (≥ 0.5 cmH2O) simultaneous to a flow decrease (in absolute value) and not followed by an assisted cycle during the expiratory period.
Double-triggering	Two cycles separated by a very short expiratory time, defined as less than one-half of the mean inspiratory time, the first cycle being patient-triggered
Autotriggering	A cycle delivered by the ventilator without a prior airway pressure decrease, indicating that the ventilator delivered a breath that was not triggered by the patient
Short cycle	Inspiratory time less than one-half the mean inspiratory time
Prolonged cycle	Inspiratory time greater than twice the mean inspiratory time