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Instructions for use
|
Atlan A300, A300 XL, A350, A350 XL SW 1.0n
193
Troubleshooting
12.3.1
Failure of one gas
Operation of fresh-gas delivery is still possible when supply of one gas fails. If, e.g.,
N
2
O fails, proceed as follows:
Electronically controlled gas mixer:
►
Switch to Air or O
2
as the carrier gas.
Mechanically controlled gas mixer:
►
Open the appropriate flow control valve for the substitute gas.
12.3.2
Replacing an empty gas cylinder
1. Close the valve of the empty gas cylinder.
2. Completely use up or completely release any gas remaining in the pressure
reducer and in the hose between the device and the gas cylinder.
If there is no patient connected, venting can be performed as follows:
– Disconnect the central O
2
supply.
– Open the flow control valve of the O
2
flowmeter. Wait until gas is no longer
flowing.
– Close the flow control valve of the O
2
flowmeter again.
3. Unscrew the pressure reducer from the gas cylinder valve.
4. Replace the gas cylinder with a full gas cylinder.
5. Connect the pressure reducer to the new filled gas cylinder, see page 60.
6. Open the valve of the filled gas cylinder slowly.
12.3.3
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.
1.
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.
Remove the breathing bag.
2. Continue the mechanical ventilation.