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_ _Printed on_18.05.05_F61733XXT01.fm
20
Dräger Medical AG & Co. KGaA 6173.3
Function description Babylog 8000
4.2 Gas Supplies
The current measured values of the O
2
and AIR gas supplies are considered when the valve bank is
adjusted. The inlet pressure for O
2
and AIR is 1.7 bar.
If the pressure falls below the limit value, a visible and audible alarm is generated. The operator is
informed about the cause of the alarm by a plain text message on the display. If the adjusted O
2
concentration is 21% or 100%, only an advisory message (no alarm) is displayed if the non-added gas
type fails.
If the pressure exceeds the limit value, the safety venting mechanism is activated and the continuous flow
is switched off. The Babylog will continue to operate only when the pressure has decreased to a
permissible level.
If the AIR supply fails, the Babylog control switches to O
2
supply. If the O
2
supply fails, Babylog switches
to AIR supply.
4.3 Airway Pressure Monitoring
Depending on the selected mode and parameter settings, a certain airway pressure time profile is set. If
the actual profile deviates from the set profile, the Babylog generates an alarm.
4.4 Disconnect Monitoring
Babylog recognizes whether or not the hose system has been connected correctly. If the hose system has
been connected incorrectly, the continuous flow is (partly) directed to atmosphere. No pressure builds up
in the hose system. Babylog checks during each breathing cycle whether a sufficiently high pressure is
available during inspiration. Since inspiratory breaths occur in the mandatory ventilation modes
IPPV/IMV, SIPPV and SIMV, this monitoring does not function in the CPAP mode.
Fig. 4: Disconnect Monitoring
Zeit
Paw
Pinsp
Pdis
PEEP
Tdis
Tdis > 25 ms !
Pdis =
Pinsp - PEEP
4
+ PEEP
time
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