Low Expired Volume; Limit Volume; Alarm Activation - CareFusion AVEA Operating Instructions Manual

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Low Expired Volume

An audible/visual alarm will be activated, and LOW Vte will be indicated whenever volume guarantee is active, and
monitored expiratory tidal volume is less than the set threshold from the volume target.
Volume threshold: 90% of Volume target
Alarm delay: 30s or 10 breaths (whichever is greater)
Alarm priority: Medium

Limit volume

All VG breaths will be cycled by volume if inspired volume exceeds a threshold based on the set Volume Target and the
leak (expressed as fraction), averaged over the previous 30 seconds.
The Volume Limit calculation varies with the degree of leak:
Mean Leak < 63%: Volume limit = (Volume Target x 1.3) x ((1.1 x Leak)+1)
Mean Leak >= 63%: Volume limit = Volume Target x 2.2

Alarm activation

During activation of the following alarms, delivered breaths are suspended and the VG control algorithm will be inactive.
Once the alarm condition is resolved, the VG control algorithm will reset, and test breaths will be delivered at the
operator set Inspiratory Pressure.
Circuit Disconnect
Safety Valve Open
Vent INOP
The VG control algorithm will reset to the operator set Inspiratory Pressure during the following alarm conditions and will
restart the VG control algorithm when the alarm condition is resolved.
Low Ppeak
Low PEEP
Flow sensor error
The VG control algorithm will be suspended if a Circuit Occlusion alarm is active. Once the condition is resolved, the VG
control algorithm will restart at the operator set Inspiratory Pressure.
Note:
Low Tidal Volume, High Tidal Volume and Low Vte Alarm Sensitivity settings are not applicable when Volume
Guarantee is active.
Chapter 3: Ventilator Operation Operator's manual
L2786 Rev. M