3-9
To do the breathing system leak test in mechanical ventilation mode:
1. Make sure that the system is Standby. If not, press the
key and select [Ok] from the
pop-up menu to enter Standby.
2. Connect the Y piece on the breathing tube to the leak test plug on the manual bag port.
3. Turn the O
2
flow control to set the O
2
flow to approximately 0.15–0.2 L/min.
4. Push the O
2
flush button to fill the bellows, folding bag rising to the top.
5. Make sure that the bag/mechanical ventilation switch is set to the
position.
6. Select the [[Maintenance] shortcut key and select [Breathing System Leak Test >>].
Select [Start] from the [Breathing System Leak Test] menu to start the breathing
system leak test in mechanical ventilation mode. Typically, the test requires 3 to 5
minutes.
7. When the leak test is completed, the message prompting test passed or failed is
displayed. If the leak test is passed, it indicates that the leakage of the breathing system
is within 0.15 to 0.2 L/min. The breathing system has good airtightness. If the leak test
is failed, it indicates that the leakage of the breathing system exceeds 0.15 to 0.2 L/min.
In this case, you need to repair the system.
NOTE
z In case of leak test failure, check all of the possible leak sources, including bellows,
breathing system tubes and sodalime canister. Check that they are correctly
connected and their connectors are not damaged.
z If there is indeed a leak, check the pneumatic circuit system for leakage and
troubleshoot the problems as described in 5.3Pneumatic Circuit System Problems.
z After leak failure is troubleshot, do the leak test again and make sure the test is
passed.
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