19
23.
Cycle the bellows assembly with the inspiratory port blocked and ensure that 55 cmH
2
O can be achieved when the
bellows is pushed down for inspiration.
24.
Check the patient system water trap is correctly screwed in place without leaks on Configuration
A
UAMs.
Configuration
B
UAMs do not use a patient system water trap.
25.
Check the correct function of the Fenton balloon. Attach the Y-piece patient connection and occlude the distal end.
Operate the bellows and observe the free movement of the balloon in its tube. Apply sustained pressure on the bellows
and check the pressure rises to at least 45 cm H
2
O. If patient system pressure is not achieved, unscrew the balloon
cover, remove balloon and perform checks (see page 22).
26.
Cycle the bellows and ensure that the pressure relieves at 55 cmH
2
O.
NOTE:
The above verification can only be performed if the oxygen sensor has been calibrated with 100% oxygen.
VAPORIZER CHECKS
27.
Check that the vaporizer is full, fully turned off and that it indicates the level of liquid.
28.
Turn on the concentrator and set an oxygen flow of 6 L/minute and wait until the output has stabilized. Set the
vaporizer output to 3%. Verify that after 2 minutes that the oxygen concentration has dropped by 3%.
NOTE:
This is a very basic test and can only indicate approximate output. The vaporizer output is affected by temperature,
flow, and time. Ideally, the above test should be conducted at an ambient temperature of 22 degrees Celsius.
RESIDUAL FLOW CHECK
29.
Turn on the concentrator and allow it to run for at least 5 minutes with the oxygen flow dial fully closed. Turn the
concentrator off and set the oxygen flow to 200 ml/min. You should observe this level of flow for at least 5 minutes. If
this test fails this could indicate a leak anywhere between the oxygen concentrator reservoir tank and the rotameter.
30.
Ensure that the service record (see appendix IV) is completed and filed. Attach a label (see appendix V) with your initials
and the date to let the users know that the UAM has received periodic maintenance and testing.
MAINTENANCE PROCEDURES
CLEANING OR REPLACING THE PRIMARY AIR FILTER
Materials and tools required:
g
3mm hex key
g
M5 crescent wrench (also known as a spanner, or flare nut wrench)
The oxygen concentrator includes a replaceable filter that cleans the room air before entering the oxygen concentrator.
Keeping it clean will extend the life of the concentrator.
To remove the filter:
1.
Turn off the UAM and disconnect it from the mains power supply.
2.
At the lower back panel, loosen the six hex screws closest to the sides of the panel, three on each side, using a 3mm
hex wrench.
3.
Carefully tilt the rear panel back from the top, taking care not to disconnect the wires attached to it.
4.
Detach the two hoses leading to the air filter. Press the orange collar to release the hose. Do not pull on the hose without
depressing the collar.
5.
Remove the cover plate that holds the filter in place by removing the center M5 nut.
6.
Filters may be cleaned by shaking or vacuuming. If the filter is too dirty to clean, replace it with a new one.
7.
Install the new filter and replace the cover plate.
8.
Replace the back panel, connect the mains power supply, and turn the UAM on.
NOTE:
Replacement filters can be ordered from Gradian but they may be less expensive and quicker to obtain from local
automotive parts suppliers.
Summary of Contents for Universal Anaesthesia Machine
Page 1: ...Universal Anaesthesia Machine Maintenance Manual...
Page 14: ...12...
Page 39: ...37 2 3 6 41 35 33 32 36 32 34 38 37 35 33 32 36 41 32 6 4 5 46 15 45 49 48 B B...
Page 40: ...38 41 36 37 39 6 40...
Page 41: ...39 25 27 29...
Page 48: ...NOTES...
Page 49: ......
