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Preoperative Sequestration (PPP and PRP)
10-16
20077/021 US
X
TRA
Operator’s Manual
The Concentrate Cycle (With the PPP/PRP Protocols)
When there is insufficient blood volume in the reservoir to complete the Fill phase of a cycle, the
Concentrate cycle may be used to complete filling the bowl from the RBC bag. This further
concentrates the collected RBC and is referred to as “concentrating” the bowl.
The Concentrate cycle is useful during preoperative sequestration protocols (PPP, PRP1, and PRP2)
because it allows the collection of PPP and/or PRP even when there is insufficient whole blood in the
whole blood bag to fill the bowl.
The Concentrate cycle also may be used to rewash the contents of the RBC collection bag.
The Concentrate cycle is only available and can only be used if the RBC collection bag contains a
sufficient volume of blood. It is available regardless of the active operating mode or protocol.
The Concentrate cycle is initiated by touching the “Conc” button. This button is accessible
from three places:
• from the Special Cycles Screen when the machine is stopped (refer to “The Special Cycles Screen”
on page 6-1),
• from the button bar of the Fill or Spill phase when the machine is paused, or
• when the “Reservoir empty. Bowl not filled” warning occurs.
When the Concentrate cycle is initiated, the fill clamp closes and the empty clamp opens, the
centrifuge continues to spin at or accelerates to its programmed rate (always 5,600 RPM for intra- and
postoperative protocols), the pump rotates counter-clockwise at the Concentrate speed to move fluid
from the RBC collection bag into the centrifuge bowl, and the Concentrate Screen is displayed (see
Figure 6-3).
Note: When the Concentrate cycle is initiated while the machine is stopped (from the Special Cycles
Screen), the centrifuge will spin for a time to reseparate the bowl contents before the pump begins
rotating. The operator may start the pump before this reseparation time has elapsed by touching the
Start button.
During preoperative sequestration protocols, the Concentrate cycle appears to be a phase, with the
indication “Conc” displayed above the phase icon in the processing displet (see Figure 10-11).
Figure 10-11 Concentrate Screen (Preoperative Protocols)
WARNING
Be sure that every bowl to be processed is adequately filled and
packed before washing. Otherwise, the Wash cycle will be
ineffective and the hematocrit will be low.