There is always some delay between the onset of the patient's inspiration and mechanical inflation- a lag period known as trigger delay. It is usually less than 100 milliseconds. Late trigger increases patient's work of breathing. Late/delayed trigger: Trigger delay > 100 milliseconds

In a patient-triggered breath, if the time lag between the onset of pressure drop and the initiation of ventilator flow exceeds 100 milliseconds, it is identified as late or delayed trigger. This delay increases the patient's work of breathing.

A pressure drop below baseline marks the start of the patient’s neural inspiratory effort. When there is a noticeable delay between this effort and the ventilator delivering flow—typically more than 100 milliseconds—it is referred to as delayed or late triggering. One common cause of delayed triggering is a high trigger sensitivity threshold, requiring the patient to generate more effort to initiate a breath. In this example, the trigger sensitivity (flow trigger) was initial

In mechanical ventilation, there is typically a delay of a few milliseconds between the onset of a patient's neural inspiration and the ventilator's delivery of flow. When this delay exceeds 100 milliseconds, it is referred to as late triggering. Late triggering increases the patient's work of breathing because the ventilator does not assist during the initial phase of inspiration. Conversely, in early triggering, the ventilator delivers a breath before the patient initiates

The following image illustrates four types of patient-ventilator interactions that can occur while triggering a breath 1) Early trigger: A mechanical breath is initiated before the onset of neural inspiration. Revere trigger is an example of early trigger where passive mechanical inflation triggers diaphragm contraction. 2) Late trigger: Mechanical inflation begins more than 100 milliseconds after the start of the patient's inspiration. 3) Failed Trigger:  Also known as an in