System Description 2-21
P/N 39551-00, Rev. F
Warning! An air detection by the DLAD 2 during Return may
indicate a failure of the BLAD. The operator must carefully note
the source of air detected. Remove the air from the line, follow
-
ing the procedures given in Chapter 5, Notice Messages and
Troubleshooting.
PUMPS
Blood Pump During anticoagulant prime, the Blood and Anticoagulant Pumps turn simulta-
neously to prime the inlet side of the donor/patient harness with anticoagulant.
In Draw, the Blood Pump pulls anticoagulated whole blood through the filter
chamber of the disposable set and pumps it into the bowl located within the Cen
-
trifuge.
During Return, the Blood Pump returns any remaining components from the
bowl and plasma bag back to the donor/patient.
Note: Actual Draw and Return modes for each procedure are defined within
each protocol section.
White Pump The White Pump pulls plasma from the plasma bag of the disposable set and
pumps it into the bowl, helping to maintain critical flow. The tubing from the
Blood Pump and the White Pump join to form one line entering the bowl.
Prime
During Prime in platelet protocols, the White Pump moves air from the reservoir
or platelet bags to the plasma bag. This reduces the amount of air that needs to
be expressed from the platelet product at the end of the procedure.
Draw
During Draw in platelet protocols that use the White Pump, the speed is set au-
tomatically according to the donor’s hematocrit. The MCS+ device calculates the
correct speed of the White Pump for each donor so that the critical flow is the
same for each donor. If no plasma is available in the plasma bag (e.g., at the be
-
ginning of the first Draw), then the White Pump is inactive. When the Weigher
detects plasma in the plasma bag, the White Pump is activated.
✍
To Next Page
Loading...
Need help?
General
