Dräger Perseus A500 Instructions For Use Manual page 267

VC - AF
Paw
Pmax
Slope
Flow
With AutoFlow, the set tidal volume VT is applied
for all mandatory volume-controlled breaths with
the lowest required pressure. The patient can
breathe spontaneously throughout the entire
respiratory cycle, during both inspiration and
expiration. The pressure patterns and flow patterns
of the mechanical inspiratory breaths correspond
to those of pressure-controlled ventilation.
Due to the patient's spontaneous breathing efforts
or compliance changes in the lungs, the tidal
volume in an individual breath may deviate from
the set tidal volume VT. However, averaged over
time a tidal volume corresponding to the set
volume VT is applied.
Instructions for use Perseus A500 SW 2.0n
PEEP
Ti
1/RR
Trigger
∆Psupp
Slope
Trigger
Insp. term.
If no automatic ventilation has previously taken
place, a volume-controlled test breath with
constant inspiratory flow is performed when
starting a ventilation mode with AutoFlow in order
to estimate the lung parameters. The inspiratory
pressure required at the start is determined from
this test breath. Each additional breath-related
readjustment of the inspiratory pressure is limited
to ±3 hPa (cmH O). The pressure difference
2
(inspiratory pressure - PEEP) is at least 5 hPa
(cmH O) and the upper inspiratory pressure limit is
2
set by Pmax. If the set value for VT is reduced, the
inspiratory pressure will be reduced by a greater
amount if necessary.
Principles of operation
267