Spectra Optia Apheresis System Operator’s Manual
169
Granulocyte (PMN) Collection Procedures
12
Collecting plasma
To collect the plasma, the system stops the collect pump, increases the centrifuge speed and decreases the inlet
pump flow rate to 60 mL/min, if necessary, to increase the packing factor to at least 14.0 and to reduce the number
of platelets flowing through the plasma port. Once the target packing factor is achieved, the system decreases the
plasma pump flow rate, which lowers the interface position. The system then increases the plasma pump flow rate
and once any remaining platelets have been cleared from the plasma line, the system moves the plasma valve into
the collect position and begins collecting plasma.
Priority of collect volume and plasma volume
The system always prioritizes collection of the target collect volume over the target plasma volume. If you decrease
a run target, make sure you thoroughly review the values that have changed on the run values screen before you
touch
Confirm
. If the decrease in the run target is significant, the target plasma volume could be reduced to zero,
and the collect volume could also decrease.
SpectraOptiaOpsManual.book Page 169 Thursday, May 17, 2018 11:24 AM
