
Fabius
®
Function Description
2-15
Cop
yr
ight
2000 Dr
aeger
M
edical,
In
c.
sec2_f
uncdescri
p_b
.fm
6.1.1
Function Description of the Compact Breathing System "Cosy"
Manual Ventilation: General
During manual ventilation, the APL valve is set to the "MAN" position. The patient
system safety valve is activated. Only the warnings/alarms for the lower O
2
limit and
for the upper airway pressure (Paw) are enabled. The piston of the ventilator is in the
upper end position in order to reduce the dead space volume of the ventilator.
Manual Ventilation: Inspiration
During inspiration, expiratory valve
1
remains closed. When the clinician compresses
the breathing bag
2
the gas mixture (expiratory gas and fresh gas) flows through the
fresh-gas decoupling valve
3
, the inspiratory valve
4
, the O
2
sensor
5
, the inspiratory
hose
6
, and the Y-piece into the patient’s lung
7
. The pressure sensor
8
measures the
airway pressure. The APL valve
9
limits the ventilation pressure. Any excess amount
of the gas mixture flows through the APL valve
9
and the non-return valve
10
to the
anesthetic gas scavenging system.
Fig. 13:
Manual ventilation (inspiration)
5
9
10
2
6
3
fresh gas
4
7
1
8
MAN
Summary of Contents for Fabius 4116029
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