Ventilation modes
29
APCV MODE
The adjustable ventilation parameters in pressure controlled assisted ven-
tilation, correspond to those in purely controlled ventilation. By setting an
inspiration trigger, the patient has the option to interrupt expiration and
trigger the next inspiration, by making an effort to breathe and reach the
trigger threshold. These additional breaths are, as in purely controlled ven-
tilation, controlled exclusively through the device. The inspiration time is
prede
fi
ned. The patient’s own respiratory effort is only able to shorten the
expiration time and thereby increase the set frequency.
Speci
fi
ed
pr
essur
e
IPAP
Time
PEEP
Controlled
Inspiration
Spontaneous
respiration triggger
Assisted
Inspiration
Assisted
Inspiration
Controlled
Inspiration
In the APCV mode, the maximum and minimum volumes, as well as a
maximum frequency, can be set as alarm parameters.
Fig. 4: APCV mode diagram
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