PN 177196BB
4-7
QUALITY ASSURANCE
ANALYZING CELL CONTROLS
4
c) An R, V, or S against a red background indicates two flags were generated,
the R, V, or S shown and an H or L not shown but indicated by the red.
3) If the instrument determines a control run had an analytical error, the control
run is rejected.
a) A rejected analysis is stored and a notification is sent to the Quality
Control Log with an automatic comment of Analytical Error.
b) Samples with analytical errors are deselected by default and not included
in the statistical calculations.
c) If a result with a non-numerical parameter result is manually selected for
inclusion in the statistics, the values replaced by the non-numeric flag are
included in the statistical calculations even though the parameter is shown
as a non-numerical flag on the table.
4) An exception to the fact that the instrument rejects (deselects) a control run
with an analytical error is the analytical error generated when the A
C
•T 5diff
Control Plus cell control is analyzed for BA% and BA#.
a) Due to the technology used and the nature of the control material, the
basophil analysis generates a BASO+ analytical alarm and causes the BA%
and the BA# to be inhibited on the Run-in-Progress screen, just as a
patient sample with the same results would be inhibited.
b) To permit assessment of the BA parameter performance, the BA% and the
BA# results are not deselected for the control results.
c) The BA% and the BA# results are, however, posted to the control file with
an “S” next to the results to indicate the results would have been
suppressed for a patient sample.
a) The S-flag prints on the QC report when printed from the QC Data Grid
screen.
5) The control results are also analyzed with the control data already accumulated
in the file to determine the mean, 2SD, and %CV of the file data.
a) The mean of the selected control results are displayed in red if greater than
the high targets, and displayed in yellow if lower than the low targets.
b) When a % CV exceeds the QC CV limit for that parameter, the parameter
field containing the out-of-limit %CV value is backlit red.
6) The laboratory can establish their own CV limits for controls and enter them
on the Quality Assurance setup options screen.
a) Entering customized QC CV limits is covered under Heading 3.2,
QUALITY ASSURANCE SETUP OPTIONS, in this Training Guide.
b) To view the current values entered, from the Main Menu click tt
tt
QA Settings tab.
7) For a detailed description of the QC Data Grid Graphs screen, refer to
Understanding the QC Data Grid Screen, under Heading 7.3 RUNNING CELL CONTROLS.
7. Have the trainee review the results of each control just analyzed and determine if all the
results are within the expected range.
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