Volume Guarantee (Vg); Breath Types; Specific Controls; Flow Cycle/Volume Limit - CareFusion AVEA Operating Instructions Manual

AVEA ventilator systems

Volume Guarantee (VG)

The Volume Guarantee function is available for the neonatal patient size setting only in PRESSURE and TCPL
ventilation modes in both the SIMV and Assist Control breath patterns. This function provides an additional operator
setting for target tidal volume. The control pressure for mandatory breaths will then be adjusted by the ventilator in order
to maintain the expired tidal volume close to the preset target volume.
Note:
Volume Guarantee is only available in the neonatal patient size setting and requires the use of a proximal flow sensor.
Refer to the AVEA

Breath types

Volume Guarantee breath operation is as follows:
When Volume Guarantee is selected, the control Insp Pres will become an advanced setting, the Volume setting will be
displayed as a primary control, and the ventilator will deliver a test breath at the set Inspiratory Pressure setting.
The inspiratory pressure for subsequent breaths will be adjusted by the ventilator on a breath-to-breath basis. Pressure
will be adjusted separately for time-triggered breaths, patient-triggered breaths, apnea backup breaths and manual
breaths in order to maintain monitored expired tidal volume close to the set target.

Specific controls

Flow Cycle
The inspiratory phase of a TCPL Volume Guarantee breath will be terminated whenever the flow to the patient falls to
the operator-set percentage (Flow Cycle) of the peak flow.
When Volume Guarantee is active and Flow Cycle setting is greater than 0, the monitored leak percentage is averaged
over the previous 30 seconds and is added to the Flow Cycle setting (to the maximum setting for the Flow Cycle control
range) to determine the threshold for patient flow.
Flow Cycle is not available in Pressure Control when Volume Guarantee is active.
Note:
Flow cycling of a breath may cause the delivered volume to be reduced. Volume guarantee will attempt to compensate
by increasing delivered pressure up to 3 cmH
will be activated if the expiratory volume falls below the alarm threshold.
Volume Limit
Volume Limit is not available for mandatory breaths when Volume Guarantee is active.
L2786 Rev. M
Chapter 3: Ventilator Operation
operator's manual for specific instructions on attaching proximal flow sensors.
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O below the high inspiratory-pressure limit. The Expiratory Volume alarm
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