P/N 53063-30, Manual revision: B
5-8
Cell Saving using Automatic Operation
Explaining the air sensor detection messages
Whenever the air sensor detects air in the disposable tubing during the EMP-
TY state, the CS5+ system assumes that all RBCs have been transferred to the
product bag from the bowl and the pump will stop. When air is detected
during the FILL state, the system assumes that the reservoir is empty. The
pump and centrifuge will stop and the device will move into the STANDBY
state, displaying the following information:
The CS5+ system will resume processing when the reservoir level sensor de-
tects that the reservoir contains the appropriate amount of fluid to begin fill-
ing the bowl. The operator can also initiate the FILL state by pressing the Fill
key when it is backlit.
If the air sensor detects air in the WASH state when less than 90% of the
wash solution volume has been processed, the pump will stop and a beep
will be heard. The following message will be displayed:
The operator should replace the saline bag and then press the Start key to re-
sume processing. If 90% or more of the wash solution volume has been
pumped, the CS5+ system will advance to the EMPTY state.
Explaining the recentrifugation delay
Once the centrifuge bowl has been stopped, red blood cell separation is
lost. This settling of cells could lead to an RBC spillage if fluid is pumped
into the bowl before the cells are allowed to separate again when the pro-
cess is resumed. To prevent this, there is a “recentrifuge delay” which will
spin the centrifuge bowl for a few moments to separate the cells before
pumping more fluid into the bowl when processing is resumed for a FILL,
WASH or CONCENTRATION state.
The delay is important to ensure proper separation, however it can be over-
ridden as follows:
"
Press the Start key
once
upon resuming the process.
If the delay is overridden, the operator must be aware of the possibility of
cell spillage caused by pumping fluid into a bowl of red cells with poor or
no separation.
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