6-21
In DuoLevel mode, you need to set the following basic ventilation parameters:
1. [O
2
%]: Oxygen concentration
2. [Phigh]: High pressure
3. [Thigh] or [f]: Time of high pressure or breathing frequency
4. [Plow]: Low pressure
5. [Tlow], [Tinsp] or [I:E]: Time of low pressure, inspiration time or ratio of
inspiratory time to expiratory time
6. [△Psupp]: Pressure support level
7. [F-Trig] or [P-Trig]: Inspiration trigger level
8. [Exp％]: Expiration trigger level
9. [Tslope]: Time of pressure rising
10. [TVapnea] or [ΔPapnea]: Tidal volume or inspiration pressure in apnea ventilation
cycle
11. [fapnea]: Frequency of apnea ventilation
12. [Apnea Tinsp]: Inspiration time of apnea ventilation
6.5.11 APRV
APRV is airway pressure release ventilation mode. It can be seen as periodical, short period
airway pressure release in CPAP mode.
The following figure shows typical waveforms in APRV mode.
Paw
Time
Phigh
Tslope
Thigh
Plow
Tlow
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General