Haemonetics MCS+, Operator And Maintenance Manual

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2-22 System Description
P/N 39551-00, Rev. F
The MCS+ device also continuously controls the speed of the White Pump so
that the critical flow remains constant even if the speed of the Blood Pump
changes during the procedure. For example, if donor flow decreases and the
Blood Pump speed decreases, the White Pump speed automatically increases to
maintain the desired critical flow.
Surge
During Surge, the White Pump draws plasma out of the plasma bag and pumps
it at high speed into the bowl to elutriate (wash out) platelets.
Return
During Return, the White Pump draws plasma from the plasma bag and mixes it
in-line with red cells that are being drawn from the bowl by the Blood Pump. The
plasma from the plasma bag and the red cells from the bowl mix at the manifold
between the bowl and the pumps and then are pumped to the donor/patient
through the Blood Pump.
Anticoagulant
Pump
The Anticoagulant Pump turns only during Draw and Prime. During Draw, the
pump delivers anticoagulant solution from the anticoagulant bag to the needle
site. At the needle site, the anticoagulant is mixed with whole blood flowing from
the donor/patient. The delivery and ratio of anticoagulant is regulated automati-
cally, according to the selected protocol parameters.
During Prime, the Anticoagulant and Blood Pumps rotate simultaneously to
prime the inlet side of the donor/patient harness with anticoagulant.
A
NTICOAGULANT
D
RIP
M
ONITOR
The anticoagulant drip monitor detects flow of anticoagulant during the Draw
mode. In conjunction with the Anticoagulant Line Air Detector (ACAD), the drip
monitor ensures flow of anticoagulant.