ResMed Elisee 150 Clinical Manual page 45

Expiratory trigger
The value which defines the end of an inspiratory phase. It can be expressed in two ways:
•
In automatic mode: Automatic cycling allows the inspiratory time to be adapted to the flow
shape, and particularly to the max.
An imaginary line (the dotted line in the diagram) is drawn from the point where the cycle
began to the point with the coordinates '3seconds; max'.
Cycling occurs at the point where this imaginary line intersects with the flow curve.
•
In manual mode (%): The expiratory trigger is expressed as a percentage of the maximum
flow.
The expiratory phase is triggered when the decreasing flow reaches the target percentage.
V
max 2
V
V
max 1
P
Vmax
V
Figure 4.14: Expiratory trigger.
NOT013189-6
Tg Exp
V
Cycling to expiration
3 Seconds
3 Seconds
Tg Exp. = 40%
Tg Exp. = 25%
Tg Exp. = 10%
V
The expiratory trigger in automatic
mode.
t
The expiratory trigger in manual
mode (%).
t
Ventilation 45/170