7 Troubleshooting
M1207026
7-5
7.2.1 Breathing
system leak test
This test checks for leaks in Vent Mode and Bag Mode components.
It is part of the overall checkout procedure, Section 3.11 “Breathing
system tests.” It is repeated here for testing convenience.
1.
Verify that AGSS is operating if equipped. For systems that have
a flow indicator on the side, make sure that the flow indicator
shows a flow in the green (normal) region.
2.
Zero the pressure gauge (Section 5.4.1).
Check valves
3.
Make sure that the check valves on the breathing circuit module
work correctly:
•
The Inspiratory check valve rises during inspiration and falls
at the start of expiration.
•
The Expiratory check valve rises during expiration and falls at
the start of inspiration.
Ventilator bellows
4.
Ventilator bellows test:
•
Set the Bag/Vent switch to Vent.
•
Set the system switch to Standby.
•
Turn all flow controls fully clockwise (closed).
•
Use the test plug or your hand to close the breathing circuit at
the patient connection.
•
Push the O
2
flush button to fill the bellows.
•
The pressure must not increase to more than 15 cm H
2
O on
the pressure gauge.
•
If the bellows falls more than 150 mL/min (top of indicator), it
has a leak.
Service Mode Tests
5.
Enter the Service Mode: Push and hold the adjustment knob on
the ventilator’s display and set the system switch to On.
•
Select and confirm “Service Mode”.
•
From the “Diagnostic Test/Tools”, select “Breathing System
Leak Test”.
•
Follow the instructions on the screen.
•
The leak rate should be less than 200 mL/min.
Bag circuit
6.
Test the bag or manual circuit for leaks:
•
Set the system switch to On.
•
Set the Bag/Vent switch to Bag.
•
Plug the bag port (use your hand or the approved test plug).
•
Close the APL valve (70 cm H
2
O)
•
Set the O
2
flow to 0.25 L/min.
•
Close the patient connection (using a hand or the approved
test plug) and pressurize the bag circuit with the O
2
flush
button to approximately 30 cm H
2
O.
•
Release the O
2
flush button. The pressure must not
decrease. A pressure decrease large enough to see on the
gauge indicates an unacceptable leak.
M1207027
004
MANUAL−DOC, Technical Reference Manual, Technical Reference Manual for 9100c, English−default
Reproduced from the electronic master in MATRIX
