Roche Diagnostics
B-68 Operator’s Manual · Version 3.1
5 Daily operation Cedex Bio System
Performing QC
Performing QC
QC is performed at regular intervals to check the integrity of the whole measuring
system.
Control A control is a sample that has been measured using all tests it is associated with, in
order to define the ranges and values that determine the correct functioning of the
instrument. This is typically done both for the normal and the pathological analyte
concentration.
e
For an overview on QC, see Quality control (QC) on page A-29.
For information on QC configuration, see Defining control definitions and lots on
page B-149.
There are two basic ways of performing QC on the Cedex Bio instrument:
Default QC Default QC is an automated process for performing QC measurements in one
request. This is the ideal method if you want to perform QC on certain days or at
certain times.
This process only applies to tests whose controls are defined to be performed as part
of Default QC. Therefore, if you intend to work with Default QC, you need to
configure the tests accordingly.
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See Defining control definitions and lots on page B-149.
Performing Default QC follows a streamlined procedure whereby QC orders are
automatically defined as soon as you identify a control. An order is defined for all
tests for which this control is defined as the Default QC, provided the test is currently
active on the system.
Interval QC
Interval QC is a process that is suitable both for performing a single QC
measurement and for performing all QC measurements that are due. You can select
all tests that require QC simply by pressing a button ( ). (This selection also
reflects QC of the type QC after Cal.) A wizard helps you select the controls, and a
placement list supports you in preparing and loading them.
Safety information
Make sure that you have read and understood section Safety information on page B-5. The
following warning messages in particular are relevant:
o Injury through reagents and other working solutions on page B-5.
o Infection by biohazardous materials on page B-5.
o Personal injury or damage to the analyzer due to contact with instrument mechanism on
page B-5.
Incorrect results due to inappropriate tube and cup placement
Inappropriate tube and cup placement may lead to inaccurate pipetting and consequently
to incorrect results.
Make sure that the primary tubes are placed centrally and perfectly vertically in the holders
in the sample area and that they are inserted firmly.
Make sure that secondary tubes are placed centrally on the primary tubes and that they
rest fully on them.
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