5.4 Volume Control
5.4.1 Functional description Volume Control
In the flow/volume oriented modes a controlled
flow is used to maintain the set inspiratory
Tidal Volume.
SVS-5036_XX
Volume Controlled ventilation ensures that the
patient receives a certain pre-set Minute/Tidal
Volume.
The SERVO-s Ventilator can be configured to
set Tidal Volume or Minute Volume. The
following parameters are set:
1. Tidal Volume (ml) or the Minute Volume
(l/min)
2. Respiratory Rate (b/min)
3. PEEP (cmH
2
O)
4. Oxygen concentration (%)
5. I:E ratio / Insp. time
6. Pause time (%/s)
7. Inspiratory rise time (%/s)
8. Trigg. Flow / Trigg. Pressure
SVS-5037_XX
The airway pressure is dependent on the tidal
volume, inspiration time and the resistance
and compliance of the respiratory system. The
set tidal volume will always be delivered. An
increase in the resistance and decrease in
compliance will lead to an increased airway
pressure. To protect the patient's lungs from
excessive pressure, it is very important to set
the upper pressure limit to a suitable value.
5.4.2 Flow adaptation
It is possible for the patient to trigger extra
breaths if they can overcome the pre-set
trigger sensitivity. It is also possible for the
patient, by their own inspiratory efforts, to
receive a higher inspiratory flow and Tidal
Volume during an inspiration than pre-set. The
flow during inspiration is constant. The patient
can trigger extra breaths.
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SERVO-s VENTILATOR SYSTEM V8.0, User's Manual
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