sorin 75220, Руководство оператора, Страница: 141 / 304

Special Cycles
X
TRA
Operator’s Manual
20077/021 US
6-3
Touching the Pause button will stop the pump rotor. The centrifuge will continue to
spin for five minutes. While the system is paused, the operator may use the Phase
buttons in the button bar to abort the Return cycle and continue processing in the
selected phase. To continue the Return cycle while paused, touch the Play button.
Adding Fluid to a Partially Filled Bowl: The Concentrate Cycle
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.
This is useful during intraoperative and postoperative processing (Pstd, Popt, Pfat and Post-op
protocols) because washing a partially full bowl results in a blood product with poor wash quality and
a low hematocrit. The preferred option is to pump already washed cells back from the RBC bag to
properly fill the bowl prior to washing.
For information on using the Concentrate cycle with the PPP/PRP protocols, refer to “The Concentrate
Cycle (With the PPP/PRP Protocols)” on page 10-16.
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:
• the Special Cycles Screen when the machine is stopped (refer to “The Special Cycles Screen” on
page 6-1),
• the button bar of the Fill 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.
Figure 6-3 Concentrate Screen
During intraoperative and postoperative protocols, the processing displet of the Concentrate Screen
tracks the volume of blood pumped into the bowl from the RBC collection bag (ml), as well as the