5.8 Spontaneous/CPAP
5.8.1 Functional description Spontaneous
breathing/CPAP
True spontaneous breathing (CPAP) occurs
when the inspiratory pressure level is set to
zero in Pressure Support.
The mode Continuous Positive Airway
Pressure is used when the patient is breathing
spontaneously.
SVS-5043_XX
The following parameters are set:
1. PS (Pressure Support level) above PEEP
(cmH
2
O)
2. PEEP (cmH
2
O)
3. Oxygen concentration (%)
4. Inspiratory rise time (s)
5. Trigg. Flow / Trigg. Pressure
6. End inspiration (%)
7. PC (pressure control level) above PEEP
(cmH
2
O).
SVS-5046_XX
A continuous positive pressure is maintained
in the airways. Properly set this may prevent
collapse of airways. Inspiration starts upon
patient effort. Expiration starts as for Pressure
Support above.
Always set the Apnea time appropriately to
the individual patient situation. If the apnea
alarm limit is reached the ventilator will
automatically switch to backup ventilation.
The alarm should alert staff to take action,
either to go back to supported mode or
change to a controlled mode of ventilation.
It is also very important to set lower and upper
alarm limit for expired Minute Volume
For maximum inspiration time, see section
Functions in ventilation modes on page 156.
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SERVO-s VENTILATOR SYSTEM V8.0, User's Manual
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