F&P Airvo 3, User Manual, Page: 55 / 216

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Appendix 4. Humidification behavior during battery operation
The Airvo 3 reduces the energy used to humidify breathing gases when not powered from a wall power supply, to conserve battery
power. In all cases, the Airvo 3 continues supplying supplementary oxygen and breathing gases until the battery is depleted.
For Optiflow high flow therapy, active humidification of the breathing gases is reduced during battery operation. If the Critically Low
Battery alarm is raised, active humidification is stopped to conserve battery power.
Connect the Airvo 3 to a wall power supply before the battery is empty to automatically resume normal therapy. If the Airvo 3 battery
is depleted, the device stops supplying supplementary oxygen and breathing gases, powers down and produces the Power Out alarm.
To resume therapy after the device has powered down, connect the Airvo 3 to a wall power supply.
The Airvo 3 delivers reduced humidity in the breathing gas during Optiflow high flow therapy until the battery is nearly depleted,
where humidity is turned off to maintain the delivery of flow and oxygen.
Low Battery Alarm
Time
Lower flow rate
Higher flow rate
Critically Low
Battery alarm
Battery
empty
Ambient
humidity
Wall power
disconnected
12 mg/L
Humidit
y in br
ea
thing gas deliv
er
ed
Flow &
supplementary
oxygen only
Active humidification
typical 40 minutes;
worst case: 20 minutes