P/N 53063-30, Manual revision: B
3-4
Ensuring Safe Operation and Patient Care
P
REVENTING
PROBLEMS
DURING
A
C
ELL
S
AVER
5+
PROCEDURE
Avoiding the consequences of flow restriction
The operator must ensure that there are no restrictions to flow in the effluent
line. If the outlet port of the bowl is inadvertently clamped off, pressure will
build up in the processing chamber to such an extent that the rotary seal will
be raised, like a safety valve to release pressure. This will result in the loss of
the pocket of trapped sterile air. The faces of the rotary seal faces will be wet
with supernatant and depending upon the nature of the supernatant, the
functional characteristics of the rotary seal may become altered. The
increased friction and excessive heat can make the contents of the bowl
unsuitable for reinfusion to the patient.
Warning: The operator must avoid blocking any tubing carrying blood from
the pump. A buildup of pressure in this tubing can result in wide dispersal
of blood.
The operator should also verify that the flow of sterile air to and from the air/
waste bag is not prevented by either a flow restriction or an air leak.
Understanding the risk of hemolysis
Hemolysis involves the destruction of red blood cell membranes with the
release of free hemoglobin into the plasma portion of the blood. Working
the blood pump against a severe flow restriction may cause hemolysis. Since
the presence of free hemoglobin in the reinfusion bag may not be readily
apparent, the operator should monitor for other indications of abnormal
operation. A restriction which will cause hemolysis may also cause a reduc-
tion in flow rate, which in turn could result in an abnormally long time
required to empty the bowl.
The CS5+ device is programmed to detect abnormally long EMPTY and
RETURN states and notify the operator with an alarm while displaying the
following message:
Warning: If the operator visually confirms that the bowl is still not empty, a
sample should be taken from the reinfusion bag prior to transfusion to the
patient to determine the presence of plasma hemoglobin. If the bowl is
empty, this could indicate a problem with the air detector and the operator
should contact the local Haemonetics technical representative.
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