AVEA ventilator systems Chapter 7: Alarms and Indicators 185
L2786 Rev. M
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
Note:
Test breaths in TCPL may be subject to the non-adjustable volume limit.
Alarm activation
Throughout activation of the following alarms, delivered breaths are disabled and the VG control algorithm will be
inactive; on deactivation the VG control algorithm will reset, with ‘test breaths’ delivered at the operator set Insp Pres.
Circuit Disconnect
Safety Valve Open
Vent INOP
The system will reset to operator-prescribed pressure during the period of activation of the following alarm conditions,
and will restart the tidal volume targeting algorithm on deactivation:
Low Ppeak
Low PEEP
Flow sensor error
Note:
Low Tidal Volume, High Tidal Volume and Low Vte Alarm Sensitivity settings are not applicable when Volume
Guarantee is active.
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