sorin 75220, Operator'S Manual, Page: 154 / 304

Automated Functions
7-6
20077/021 US
X
TRA
Operator’s Manual
Double Volume Wash Function
If at any time during processing a bowl cannot be completely filled (such as the reservoir becoming
empty during the Fill phase), a suitable warning is issued and the Double Volume Wash function
becomes available.
The Double Volume Wash function is initiated by touching the “Double Wash” button which
appears in the button bar at the bottom of the screen during warnings when the bowl
cannot be completely filled.
Once initiated, a Wash phase will be started where double the current programmed wash volume will
be set. The operator may modify this volume as usual during the phase from the processing displet of
the Wash Screen.
The double wash volume only persists for the cycle in which it is initiated. In subsequent cycles, the
wash volume is set to the programmed value for the current protocol.
Better Quality Wash (BQW) Function
When the Better Quality Wash (BQW) function is active, the blood in the bowl undergoes a series of
operations on the basis of a special protocol (accelerations and decelerations of the centrifuge)
designed to optimize the Wash phase of a cycle.
The BQW function is only available for intraoperative and postoperative protocols (Pstd, Popt, Post-op,
and derivatives except for Pfat protocol). It is available under every operating mode.
The BQW function is a protocol parameter that can be permanently stored in custom protocols, so that
unlike the other automations, BQW activation may have a different status for each protocol that
supports it.
If the BQW function is activated before processing reaches the Wash phase, then for every 200 ml of
wash solution used during the Wash phase the unit runs a BQW cycle which includes the following
steps:
1. The pump stops and the centrifuge decelerates to 1,500 RPM.
2. The centrifuge then accelerates to 5,600 RPM.
3. After a short delay, the pump starts rotating again with a slow ramp-up to the standard Wash
speed. The length of the delay is dependent on the bowl size in use:
Þ X/55: 13 seconds
Þ X/125: 8 seconds
Þ X/175: 18 seconds
Þ X/225: 18 seconds
The BQW function can be in one of three states:
• Off - In this state the BQW function is OFF and no BQW cycle will be performed during the Wash
phase.
• 2x (short BQW) - In this state, the BQW cycle will be performed on the RBCs in the bowl up to
two times during the Wash phase.
• 4x (standard BQW) - In this state, the BQW cycle will be performed on the RBCs in the bowl up
to four times during the Wash phase.
When the BQW function is activated during the Wash phase, a BQW cycle is immediately performed if
the following condition is true:
WARNING
In case a partial bowl is washed, the hematocrit of the collected
blood as well as the removal of waste components might be lower
than expected.