Haemonetics MCS+ Service Manual

Disposables 3-5
P/N 39551-00, Rev. F
Note: The nature of centrifugal separation is such that the lines of definition
between blood components are not distinct. A minimal contamination of an un-
desired component with the desired component is to be expected. For example,
some platelets may be present in the plasma in a PLP procedure.
When the bowl is filled, plasma, the lightest component (and therefore closest to
the core) begins to overflow through the effluent path and outlet port (Figure 3-3)
.
Overflow continues until the desired component exits the bowl and is collected
into a collection bag.
The Latham
Bowl “Surge”
Process
The “Surge” process is used in platelet collection protocols. Each cycle of the
platelet protocols consists of a Draw and Return mode. Surge is part of the Draw
mode.
After most of the plasma has exited the bowl, the buffy coat reaches the appro-
priate position within the bowl and is “detected” by the Bowl Optics sensor. Fig-
ure 3-4 shows when the buffy coat is detected by the Bowl Optics. This initiates
the Surge phase of the protocols
.
Surge is the elutriation (washing) of platelets away from the buffy coat. This is ac-
complished via high speed recirculation of plasma from the plasma bag back
through the bowl.
✍
Figure 3-3, Plasma Overflow
Plasma
A
nticoagulated
Whole Blood

Haemonetics MCS+ Specifications

General

Brand	Haemonetics
Model	MCS+
Category	Medical Equipment
Language	English