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10.12.10 MMV
MMV
– Spontaneous ventilation with mandatory minute volume
Description:
Initially, the ventilator allows spontaneous test
cycles with a support pressure of 5 or 10
cmH2O above the adjusted PEEP.
Then the minute volume is measured, and
approximate compliance is calculated.
For each subsequent cycle, the ventilator
recalculates the compliance of the previous
cycle and adjusts the pressure level to the
next cycles, reaching the adjusted minute
volume.
The increase in pressure between the cycles
never exceeds 3 cmH
2
O and the maximum
level reached does not exceed the value of
the set limit pressure.
If this value is reached, and the adjusted
minute volume is not reached, the limited
pressure alarm will be displayed.
On the other hand, if the set apnea time is
reached, the backup ventilation will be
activated.
The onset of inspiration occurs when the
patient makes an effort that is recognized by
the ventilator according to the adjusted
trigger. If the backup is active and the patient
goes into apnea, the onset of inspiration will
occur according to the set apnea time. Cycle
(transition between inspiration and expiration)
occurs by flow as it falls to a certain
percentage of its maximum reached value.
Adjusted Parameters:
•
MINUTE VOLUME
•
PEEP
•
CYCLE (% FLOW)
•
PRESSURE TRIGGER
•
FLOW TRIGGER
•
O
2
CONCENTRATION
•
RISE TIME
•
LIMIT PRESSURE
•
BACKUP
o
VCV Backup
▪
VOLUME
▪
RATE
▪
FLOW
▪
FLOW WAVE
▪
PAUSE
o
PCV Backup
▪
CONTROL
PRESSURE
▪
RATE
▪
INSPIRATORY
TIME
o
Automatic
Backup
(1)
1
– Whenever the set
apnea time is
reached, the ventilator
triggers a ventilator
cycle, the setting of
which is based on the
current mode settings.
