6-11
In P-A/C under NIV, you need to set the following ventilation parameters:
1. [O2%]: Oxygen concentration
2. [Pinsp]: Pressure control level of inspiration
3. [Tinsp] or [I:E]: Time of inspiration or ratio between the inspiratory and
expiratory time
4. [f]: Breathing frequency
5. [Tslope]: Time of pressure rising
6 [PEEP]: Positive end-expiratory pressure
7. [Assist]: Assisted trigger
8. [F-Trig] or [P-Trig]: Inspiration trigger level
6.7.6 CPAP/PSV
PSV, pressure support ventilation, is a pressure mode. The system delivers a PSV when it
detects that patient inspiratory effort reaches the preset inspiration trigger level. Time of
pressure rising and pressure support level are set by the user. At the beginning of inspiratory
phase, patient airway pressure rises to the preset pressure level within the preset Time of
pressure rising and is held at this pressure level until patient inspiratory flow is detected to
reach the expiration trigger level. In PSV, when the airway pressure is held at the preset
pressure level, delivered gas flow changes with the resistance and compliance of the patient’s
lungs.
Paw
Flow
Time
Apnea time
△Papnea
Apnea ventilation
Apnea vent cycle
I:E=1:2
Tslope
△Psupp
PSV
Exp. trigger
Insp. trigger
Insp. trigger
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