Gambro AK 95 S Service Manual page 116

Base-kit
37. Simulated treatment
Note! The following test procedure should
preferably not be started or stopped during a
taration of the UF-system. In this case there
might be a small difference in volume.
Simulate a venous pressure of approx.
50 mm Hg by blocking the pressure port with a
blocked piece of tubing and turning the level
adjustment knob.
Insert the filled venous drip chamber in the air
detector.
Press fluid bypass-button (for bypass mode).
Connect a T-piece to the dialysis tubings. Make
sure that the tubing is long and thin enough to
create a TMP of approx. 200±100 mm Hg during
the simulated treatment.
Press fluid bypass-button (for direct mode).
Put the end of the tube in a measuring glass
placed on the bottom tray.
Note! The position of the measuring glass will
affect the TMP.
Set the blood pump speed to 100 ml/min and
start the blood pump.
Set minimum UF-rate to 0.0 l/h.
Make sure the measuring glass is filled to 1.00 l
with water of 37.0 °C.
Set a UF-volume of 0.9 l and treatment time of
1:00 h.
Check that the tube to the measuring glass is
filled with water and all air bubbles are evacu-
ated. Let the UF-rate stabilize.
Simulate blood in the priming detector with a
piece of paper.
Make sure (again) that the measuring glass is
filled to 1.00 liter.
Press the UF START/STOP button.
AK 95 / AK 95 S HCEN12189 Rev. 10. 2006
Note! It is very important to do these things
more or less simultaneously i.e. within seconds.
Check the residual volume at TIME = 0:00.
Approved residual volume: 100 ml +/- 50 ml
Repeat the test if smaller deviations appear.
Note! All kind of fluid alarms (conductivity etc.)
has to be avoided.
38. Check that the overload protection on the
heparin pump is working.
39. Check the arterial clamp by attaching the
calibration tube set into the arterial clamp.
Enter priming mode and create a level
detector alarm to get the clamp closed.
Apply a pressure of 600 mmHg. Check that
the pressure does not fall more than 30
mmHg in 15 seconds.
40. Check the venous clamp by attaching the
calibration tube set into the venous clamp.
Enter priming mode and create a level
detector alarm, by lowering the level in
the drip chamber, to get the clamp closed.
Apply a pressure of 600 mmHg.
Check that the pressure does not fall more
than 30 mmHg in 15 seconds.
41. If installed: Check the battery backup by
disconnecting the mains plug. Let the
machine run for at least 1 minute.
Note! This is not a capacity test of the
backup batteries.
42. Reconnect the mains plug to the outlet
supply of an electrical safety tester.
Perform the Earth Leakage Test (ELT) and
the Patient Earth Leakage Test (PLT)
according to instructions available in
HCEN12190, Electrical safety inspections
for AK-machines.
43. Perform heat/chemical disinfection.
Maintenance Manual
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