28
Ventilation modes
PCV MODE
In the PCV mode, the ventilation is controlled exclusively through the device.
The patient is unable to breathe spontaneously. For controlled ventilation,
the inspiration trigger must be set to “OFF”. The respiratory cycle is based
on the set frequency and a set I:E ratio. The inspiration pressure (IPAP)
and end expiration pressure (PEEP) de
fi
ne the pressure range in which
the patient is ventilated. The pressure increase can be selected by setting
a ramp. The inspiration volume adjusts itself to the condition of the lungs
(compliance and resistance). To safeguard a minimum volume (Vt min), a
value can be preset, with the option of using additional pressure (IPAP +
additional pressure) to reach this minimum volume.
Speci
fi
ed
pr
essur
e
IPAP
Time
PEEP
Controlled
Inspiration
Controlled
Inspiration
Controlled
Inspiration
Controlled
Inspiration
In the PCV mode, the maximum and minimum volumes, as well as a maxi-
mum frequency, can be set as alarm parameters.
Fig. 3:
PCV mode diagram
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