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In a pressure breath, a variable flow delivers to reach the set inspiratory pressure above
baseline. Once the set pressure level is achieved, flow is regulated to maintain this pressure
for the duration of the set inspiratory time. The monitored peak pressure is equal to the sum
of the inspiratory pressure and PEEP settings.
Primary controls: Active in Pressure A/C mode are Rate, Inspiratory Pressure, Inspiratory
Time, PEEP, Flow Trigger and %O
2
.
Advanced settings: Available in Pressure A/C mode are Machine Volume, Volume Limit,
Inspiratory Rise, Flow Cycle, Bias Flow and Pressure Trigger.
Volume Guarantee breaths* (neonatal patients only): When Volume Guarantee is
selected, the control Insp Pres becomes an advanced setting, the Volume setting displays
as a primary control and the ventilator delivers a test breath at the set inspiratory pressure.
The inspiratory pressure for subsequent breaths adjusts breath-to-breath. The pressure
adjusts separately for time triggered breaths, patient triggered breaths, apnea backup
breaths and manual breaths to maintain monitored expired tidal volume close to the
set target.
*Requires wye flow sensor.
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