P/N 53063-30, Manual revision: B
3-6
Ensuring Safe Operation and Patient Care
Avoiding red blood cell spillage
Under normal conditions there should be little or no red blood cell spillage
and the effluent line sensor will reduce the occurrence of spillage. During
the WASH state, two conditions may especially result in red blood cells
spilling over into the waste bag:
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Overfilling of the bowl during manual processing.
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Excessive flow rate of saline solution due to reprogramming of pro-
cessing parameters by the operator.
To avoid a red cell spillage due to overfilling, the operator can press the
Pause key and stop the pump, then use the pump slew keys to gradually
adjust the pump speed to the desired speed while observing the cells for
separation. Pressing the pump Pause key again will cause the pump to
resume at the previous rate.
Caution: A wash flow rate which is too low will provide a poor wash of the
cell since there will be insufficient agitation and mixing of saline solution
with the RBC layer.
Managing the inventory of air
The disposable bowl as received from the factory is full of sterile air. During
each fill cycle, this sterile air is expelled into the waste bag while the bowl is
filling and is returned from the waste bag while the bowl is emptying. It is
important to permit the sterile air to return to the bowl from the waste bag to
avoid creating a negative pressure in the bowl as it is emptying.
Caution: A full waste bag should be changed or emptied only when the
bowl is emptied of blood (and filled with air). The waste bag may be par-
tially emptied through the drainage port at any time as long as the fluid level
in the bag does not fall below the waste bag drainage port.
