Haemonetics LN9000-110-EWC, Operation Manual

Page: 38 / 110

2-8 Describing the MCS+ Cabinet Components
P/N 85213-30, Manual revision: B
RETURN mode
The pressure readings will vary as blood is returned to the donor. If a significant
pressure increase is detected, and the pressure readings rise above a programmed
value, the pump speed will automatically decrease until a sufficient pressure
change is measured. If pressure readings remain high, the Blood pump will stop,
and an explanatory screen message will appear with an alarm.
When pressure is measured to be within the normal operating range, the pumps
will resume operation until reaching the programmed pump speed.
Warning: The operator must remain aware of the fact that a high pressure warn-
ing can indicate a possible flow obstruction and could cause red blood cell
hemolysis, and/or damage the vein. Corrective action is necessary and the op-
erator should intervene immediately, following the actions listed on the HELP
screen. The operator can also consult Chapter 6 for information about avoiding
flow restrictions.
System Pressure Monitor (SPM)
The SPM, located on the right side of the MCS+ top deck, measures pressure in
the effluent tubing. This measurement verifies that the sterile seal, between the
head and the body of the centrifuge bowl, remains intact.
If the SPM detects that pressure in the system increases or decreases abnormally,
the MCS+ safety system will stop the pumps will stop and provide an explanatory
message with an alarm. Centrifuge function will remain unaffected.
Air detectors (top
deck)
The MCS+ is equipped with an assembly of ultrasonic sensors designed to detect
the presence of air, bubbles or foam in the fluids flowing through the disposable
set tubing.
If air is detected outside of the normal range during any mode (PRIME, DRAW or
RETURN), the detectors will:
!
Activate the MCS+ safety system.
!
Stop the operation in progress.
!
Provide the operator with an error message and an audible alarm.
Caution: In the case of any air detection alarm, the operator must respond imme-
diately, note the source and take immediate action, following the actions listed
on the HELP screen.