PN 177196BB
4-20
QUALITY ASSURANCE
INTERPRETING AND USING THE XB/XM DATA
4. For the remaining six of the Nine-Parameter XM Analysis
a. Your laboratory must evaluate the results of your population and decide what
represents an acceptable mean value for each parameter to begin establishing the
XM mean values for your patient population
b. Due to the wide physiological range for the other six parameter, you may wish to
use a higher percent limit than you use for the MCV, MCH, and MCHC parameters.
4.8 INTERPRETING AND USING THE XB/XM DATA
A Objectives
When you have completed this topic, you will be able to:
B State the minimum number of samples collected for an XB/XM batch.
B Describe the three areas of the XM graph.
B Define the terms mean values and limits as they apply to the XB/XM analysis.
B Identify the problem parameter (or parameters) causing an XM batch to be
out-of-control.
B References
In the Online Help System or the Instructions for Use manual, refer to Heading 7.6 XB
ANALYSIS
.
C Special Instructions
1. The instrument must be powered up.
2. Data needs to be collected for at least one XB/XM batch if you want to refer to XB/XM
data and graph displays.
D Topic Notes and Tasks
Interpreting the XB/XM Data
1. When XB/XM option is turned on, the Workstation:
a. Stores the results of patient samples (including repeat samples) as they are cycled.
1) It excludes a patient sample result from the XB/XM analysis if one of the
parameters used in the analysis is:
a) Incomplete (
....)
b) Above the linear range (
++++)
c) Flagged with an SCL, MIC, or SCH
2) It excludes results from the XB/XM analysis for the following sample types:
a) Samples processed in the reproducibility mode
b) Samples processed in the calibration mode
c) Controls with reserved lot numbers
d) Blank (background) samples
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