Instructions for use | Atlan A100 (XL), A300 (XL), A350 (XL) SW 2.1n 235
Troubleshooting
12.3.4 Complete failure of the gas supply
WARNING
Risk of patient recovering consciousness
If the gas supply fails completely, further operation takes place through gas supply
of the anesthesia machine with ambient air. The ventilation continues with the
ambient air, however no more anesthetic agent or additional oxygen is delivered.
The inspiratory anesthetic gas concentration and the inspiratory oxygen
concentration in the breathing gas fall.
► Monitor the gas mixture carefully and use intravenous anesthetic agents if
necessary.
If the central O
2 supply and the central Air supply fail at the same time and no gas
cylinders are connected, the patient can nevertheless be mechanically ventilated.
This is possible because the piston ventilator does not require a drive gas.
CAUTION
Risk of increased anesthetic gas concentrations in the ambient air
If the breathing bag is not connected, expiratory anesthetic gases may escape from
the breathing system.
► Ensure adequate circulation of the ambient air or connect a breathing bag.
1. Remove the breathing bag.
2. Continue the mechanical ventilation.
When the breathing bag is removed, the missing fresh-gas volume will
automatically be filled by ambient air. Nevertheless, the Fresh gas low or leakage
alarm is likely to be triggered.
12.3.5 After the central supply is restored
1. Connect the compressed gas hoses to the terminal units.
2. Close the gas cylinder valve on the corresponding gas cylinder again.
On devices that are equipped with Advanced Cylinder Support, the gas cylinder
valves can remain open.
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