AVEA ventilator systems Chapter 3: Ventilator Operation 95
L2786 Rev. M
Note:
The ventilator may assert a circuit occlusion alarm in conditions when measured PEEP is significantly greater than
operator set PEEP.
Inspiratory Flow Trigger (Flow Trig)
The inspiratory trigger mechanism* is activated when the Net Flow becomes greater than the Inspiratory Flow Trigger
setting. Net Flow is defined as [Delivered Flow − Exhaled Flow] (or Wye Inspiratory Flow when using a wye flow
sensor). When the Inspiratory Flow Trigger is enabled, a low level of Bias Flow is delivered to the patient circuit during
the exhalation phase of the breath.
Range: 0.1 to 20.0 L/min
Defaults: 1.0 L/min (Adult/Pediatric)
0.5 L/min (Neonate)
*See also “Pres Trig” on 101.
CAUTION
If a proximal flow sensor is used it must be attached at both the patient wye and at the ventilator connection to
ensure proper function of the AVEA.
Note:
To ensure adequate bias flow for inspiratory triggering the bias flow setting should be at least 0.5 liters per minute
greater than the flow trigger threshold.
%O
2
The % O
2
control sets the percentage of oxygen in the delivered gas.
Range: 21 to 100%
Default: 40%
Note:
During Heliox administration the %O
2
control sets the percent of Oxygen in the delivered gas. The balance of the
delivered gas is Helium.
Pressure High (Pres High)
This control is only available in APRV / BIPHASIC Mode. It controls the baseline pressure achieved during Time High.
Range: 0 to 90 cmH
2
O
Default: 15 cmH
2
O
Time High
Available in APRV / BIPHASIC mode only, this control sets the maximum time for which the Pressure High setting is
maintained.
Range: 0.2 to 30 seconds
Default: 4 seconds
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