sorin 75220, Operator'S Manual, Page: 91 / 304

Processing
X
TRA
Operator’s Manual
20077/021 US
5-9
Figure 5-15 Fill Phase of the Processing Screen
For a detailed explanation of the
Fill phase screen, read “Fill
Screen” on page 5-39.
As blood enters the bowl during the Fill phase, centrifugation concentrates the red blood cells into the
bowl while supernatant components are expelled to a waste bag. This continues until the buffy coat is
detected, which indicates that the bowl is properly filled with RBCs.
The volume and Hct of the blood pumped into the bowl are displayed on the processing displet and
constantly updated by the system’s software.
Except when the system is processing with the Popt, Post-op and Pfat protocol, the fill pump speed
may be adjusted from the processing displet (refer to “Modification of Parameters” on page 5-5).
The cycle may be paused and resumed using the Pause and Play buttons. Refer to
“Pausing and Resuming the Cycle” on page 5-11.
Note: When processing with the Popt, Post-op and Pfat protocol, the Fill phase consists of two
periods of filling at different pump speeds with an automatic pause after each. Refer to “Popt” on page
5-24.
When operating in 1 Touch and Automatic modes, processing is advanced to the Wash phase
automatically. No manual intervention is necessary.
Note: It is possible to manually switch phases while operating in the Automatic or 1 Touch modes by
pausing the phase and using the phase buttons which appear in the button bar at the bottom of the
screen. Refer to See “Pausing and Resuming the Cycle” on page 9-11.
In cases of extremely high blood loss where rapid reinfusion is the primary consideration, the
physician may choose to bypass the Wash cycle and go directly to the Empty cycle.
The Wash Phase
When the Wash phase begins, the centrifuge continues to spin and the processing displet changes to
reflect that the Wash phase is in progress (see Figure 5-16).
The fill clamp is held open, the other clamps closed, and the pump slowly rotates clockwise for a short
time to pump the blood in the line between the bowl and clamps back into the fill line to prevent
overfilling of the bowl. Finally, the pump rotates counter-clockwise at the wash fill speed to move
saline solution from the wash bag into the bowl.
Note: If the last phase was the Concentration phase, when the unit switches to the Wash phase, the
flow is automatically adjusted, in order to prevent possible losses of red cells.
CAUTION
Inadequate washing of the packed red blood cells may lead to an excessive
level of contaminants (e.g., anticoagulant, plasma free hemoglobin) in the
processed blood.