9.4 Attachment 4 – Active Gas Scavenging (AGS) alternatives
To avoid oxygen accumulation in the direct environment of the device, a proper scavenging is
recommended although no anesthetic agent is used. If no AGS is available and the anesthesia device
has the outlet of surplus gases behind doors, the doors must be left open to avoid oxygen accumulation.
9.5 Attachment 5: Increasing fresh gas flow by opening the emergency O2 flow control
Follow the description below to additionally increase the fresh gas flow by opening the emergency O2-
flow-control. This additional gas is added to the already set fresh gas flow of the mixer. As only oxygen
will be added, the FiO2 will increase.
An alarm will occur; the priority can be reduced by resetting the alarm.
Perseus (electronic mixer)
Switch the lever to “Add O2” and open the flowmeter to start additional flow (>20 L/min max), reset the
alarm by pressing “ALARM RESET” and confirm by pressing the rotary knob.
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