Haemonetics MCS+, Operator And Maintenance Manual

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3-4 Disposables
P/N 39551-00, Rev. F
The rotary seal provides a barrier between the sterile interior sections of the bowl
and the outside environment. It is the only point within the Latham bowl struc-
ture where the stationary and rotating sections make contact.
During Draw (Figure 3-2), anticoagulated whole blood enters the inlet port and
is directed down the feed tube to the bottom of the bowl. At this point, because
of the presence of centrifugal forces generated by the spinning bowl, the fluid mi-
grates to the outer periphery of the bowl. During this process, sterile air in the
bowl is displaced into a collection bag.
Centrifugation takes place as anticoagulated whole blood continues to enter the
bowl. The blood component of the highest density, the red blood cells (RBCs),
migrate to the outer wall of the bowl. In order of decreasing density, the white
blood cells (WBCs), platelets, and plasma form vertical layers.
Figure 3-2, The Beginning of the Draw Mode
Air
Plasma
RBC
Anticoagulated
Whole Blood