112
10.12.11 VS
VS - Spontaneous ventilation with assured volume
Description:
Initially, the ventilator allows spontaneous test
cycles with a support pressure of 5 or 10
cmH2O above the adjusted PEEP.
Then the delivered volume is measured, and
the approximate compliance is calculated.
For each subsequent cycle, the ventilator
recalculates the compliance of the previous
cycle and adjusts the pressure level for the next
cycles, reaching the adjusted volume.
The increase in pressure between the cycles
never exceeds 3 cmH2O and the maximum
level reached does not exceed the value of the
set limit pressure.
If this value is reached, without the adjusted
volume being 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:
•
VOLUME
•
PEEP
•
CYCLE (% FLOW)
•
PRESSURE TRIGGER
•
FLOW TRIGGER
•
O
2
CONCENTRATION
•
RISE TIME
•
LIMIT PRESSURE
•
BACKUP
o
PRVC Backup
▪
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.
•
The apnea time alarm can be turned off. In this condition, BACKUP VENTILATION WILL
NEVER BE ACTIVATED.
•
If backup ventilation is turned off, the operator must be sure that this adjustment is
necessary and aware of the clinical implications involved.
