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APRV
Airway Pressure Release Ventilation
Free spontaneous breathing at a raised CPAP pressure
level together with a short period of low pressure
(Release).
This mode is intended for patients who are breathing
spontaneously but who need assistance with CO
removal.
Set the pattern of ventilation for APRV with the ventilation
parameters:
Inspiration time »T
«
high
Expiration time »T
«
low
Inspiration pressure »P
high
Positive end-expiratory pressure »P
O
-concentration »O
«
2
2
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To set:
Touch the appropriate screen knob.
Adjust to the desired value = turn rotary knob.
Confirm setting = press the rotary knob.
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APRV can be expanded with the following ventilation
parameters:
Apnoea Ventilation – for automatic switch-over to
volume-controlled mandatory ventilation if the patient
stops breathing.
If breathing stops, Evita 4 emits an alarm after the set
alarm time (T
> ) and starts volume-controlled
Apnoea
ventilation with the set ventilation parameters:
Frequency »f
«
Apnoea
Tidal volume: »V
«
TApnoea
2
«
«
low
Paw
T
high
T
Flow
Operation
Setting Ventilation Modes
P
high
t
P
low
low
t
67
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