Beckman Coulter UniCel DxC 600, Instructions For Use Manual

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A13914AF
5-3
Quality Control
Quality Control
5
Flags Generated on Printed QC Reports
These flags appear in the remarks column of the QC results report:
•
Greater than 2SD
•
Greater than 3SD
•
ACC (Accuracy) two successive controls greater than 2SD
•
PRE (Precision) two successive controls greater than 2SD on opposite sides of the assigned mean
•
Mean and/or SD not assigned
Additional QC Precision Rules
Some additional Westgard QC rules are helpful when determining whether the system is in control.
These are not flagged by the DxC QC package but can help in determining system performance.
Refer to
Figure 5.1 .
•
4-1S Within or Across: Last Four Results of One or Two Levels of Control Were More than 1 SD
From the Mean on the Same Side
This rule judges the result out-of-control if the last four results from one or two levels were
more than 1 SD from the mean in the same direction.
•
10X Within or Across: Last Ten Results of One or Two Levels of Control Were All on the Same
Side of the Mean
This rule judges the result out-of-control if the last ten results from one or two levels were all
on the same side of the mean.
Figure 5.1 QC Accept/Reject Chart Using Westgard Rules
E015001L.EPS
ACCEPT/REJECT CHART
I N CO N TROL ACCEPT RU N
Control
Data
2S
3S 2S 4S 1S X
1
1 2 R 4 10
YES YES
YES
N O
N O
N O
N O N O N O
YES YES YES
OUT - OF - CO N TROL REJECT RU N E V ALUATE