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Chapter 8
Operating Instructions
REF 1057983 A Respironics V200 Ventilator Operator’s Manual 8-21
Selecting the Inspiratory Trigger (I-Trigger)
The I-Trigger setting determines how inspiratory effort is detected (by
measuring a drop in airway pressure or an increase in patient inspiratory flow)
and when inspiration begins.
• In VCV and PCV, you can select a pressure or flow I-Trigger.
• In NPPV, the I-Trigger is always Flow.
Follow these steps to set the I-Trigger:
1. Push the VCV SETTINGS, PCV SETTINGS, or NPPV SETTINGS button.
2. Push the I-TRIGGER button. The inspiratory trigger window insert
(Figure 8-21) appears.
3. In VCV and PCV: select Pressure or Flow. (Because only the flow trigger
is available in NPPV, the Pressure and Flow buttons do not appear in
this insert in NPPV.)
4. Adjust and change the value as described above.
Figure 8-21: Inspiratory Trigger Window
Settings with Calculated Values
Certain window inserts that are used to modify values of settings can also have
calculated results in them (Figure 8-22).
When the settings window insert being displayed is VCV Rate, the calculated
minute volume that results from the rate and tidal volume settings is displayed
along with the rate value. This is also the case when the tidal volume setting
window insert is displayed. When the setting window insert for PCV Rate is
You can select Pressure or
Flow in VCV or PCV. In
NPPV, only Flow I- Trigger
is available (these buttons
do not appear).