Datex-Ohmeda 2 Vap. Trolley, Operation Manual, Page: 97 / 104

Appendix - Preoperative Tests
1006-0938-000
A-21
•Release the flush button. The pressure must not decrease. A pressure
decrease large enough to see on the gauge indicates a leak. Look for
and repair the leak (loose drain plug, open canister, breathing circuit
assembly not pushed on completely).
•If your system has CO
2
bypass, move the absorber canister release to
the open position and do this test again to look for leaks in the bypass.
Note:
If the message window shows “Close absorber canister”, you DO
NOT have a CO2 bypass. Close the canisters and do step 6 again.
7. Test the APL valve:
•Fully close the APL valve.
•Set the total fresh gas flow to 3.0 L/min and make sure that the value on
the inspiratory pressure gauge is less than approximately 82 cmH
2
O.
•Fully open the APL valve.
•Make sure that the value on the inspiratory pressure gauge decreases to
approximately zero.
•Push the flush button and make sure that the value on the inspiratory
pressure gauge stays near zero.
•Set the O
2
flow to minimum and make sure that the value on the
inspiratory pressure gauge does not decrease below 0 cmH
2
O.
8. Remove your hand (or the test plug - step 5) from the patient connection.
Monitor and ventilator
tests
1. Connect a test lung to the patient connection.
2. Set the Bag/Vent switch to Vent.
3. Set the controls:
•Ventilation Mode: Volume control (Select from main menu)
•Ventilator:
Tidal Vol: 400 ml
Rate: 12
I:E Ratio: 1:2
Plimit: 40 cmH
2
O
PEEP: Off
•Anesthesia Machine
O
2
flow: minimum flow (25-75 mL/min)
All other gases: Off
Push flush to fill the bellows.
4. Make sure that:
•Mechanical ventilation starts.
•A subatmospheric pressure alarm does not occur.
Note: With active gas scavenging, too much scavenging flow can cause
subatmospheric alarms.