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5.6.1.10. Airway Pressure Release Ventilation (APRV)
Airway pressure release ventilation mode is provided by the ventilator or triggered by the patient.
The ventilator waits for the patient to try to breathe to provide airway pressure release ventilation,
the inspiratory and expiratory switches according to preset expiratory trigger sensitivity. At the end
of the high-pressure level maintenance time, the ventilator provides a pressure release according
to the set low-pressure level, determines the end of the pressure release according to the set
inspiratory trigger sensitivity or the low-pressure level maintenance time, and switches to the
high-pressure level to enable the patient to complete an extra breath. If there is no patient
breathing, the ventilator provides pressure-controlled ventilation according to the set
high-pressure level, and the inspiratory and expiratory maintenance time is switched according to
the set high-pressure level maintenance time and inspiratory trigger sensitivity or low-pressure
level maintenance time. The tidal volume of the patient depends on the high-pressure level, the
pressure support level, and the inspiratory force of the patient.
APRV ventilation mode setup parameters:
⚫ P
HIGH
:5～70
⚫ P
LOW
:3～50
⚫ T
HIGH
:0.2～30 step:0.1
⚫ T
LOW
:0.3～30 step:0.1
⚫ △P:3～50cmH
2
O
⚫ V
SENS
:0.5～15L/min
⚫ E
SENS
:5～75%
⚫ P
SENS
:﹣20～﹣1cmH
2
O
⚫ T
SLOPE
: 0～2.0sec
⚫ I
SENS
: 5～75%
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