Siemens ADVIA 2120, Operator'S Manual, Page: 150 / 477

6-32 Flags
Comparison Error WBCB/WBCP (WBC-CE, WC)
Definition
The Comparison Error WBCB/WBCP flag is triggered if the difference in the
WBC counts obtained from the baso and perox channels exceeds a preset limit.
The WBC count for each sample is independently determined in the baso channel
(WBCB) and the perox channel (WBCP).
The flag is triggered if:
•
(WBCB - WBCP)
≥
1.0 x 10³ /
μ
L when WBCB
≥
2.0 x 10³ /
μ
L and
≥
10.0 x 10³ /
μ
L
•
(WBCB - WBCP)
≥
10% of WBCB when WBCB
≥
10.0 x 10³ /
μ
L
•
(WBCB - WBCP)
≥
20% of WBCB when WBCB
≥
2.0 x 10³ /
μ
L
Results Flagged
WBC, %NEUT, #NEUT, %LYMPH, #LYMPH, %MONO, #MONO, %EOS,
#EOS, %BASO, #BASO, %LUC, #LUC
Corrective Action
Multiple occurrences of this flag, especially for consecutive samples, can indicate
a system problem. However, isolated instances of this flag are usually sample
related.
The following list of sample-related causes may not contain all conditions that
could cause this flag. There is no intention to associate the flag with specific
diagnoses.
System Related Sample Related
1. If the Perox Noise (PX-NO) and/or No
Valley Perox (PX-NV) sample/system flags
are triggered, troubleshoot the perox channel.
2. If there are no perox flags, troubleshoot the
baso channel.
•
Incomplete red cell
lysis
•
Nucleated red blood
cells
•
Malaria parasites
Hgb Irregular Flow Rate (HGBIFR, HR)
Definition
The HGB Irregular Flow Rate flag is triggered if HGB baseline or sample
transmission is erratic.
For each sample, the difference between the maximum and minimum
transmittance is obtained for the baseline and sample transmittance.
The flag is triggered if the baseline or sample value is greater than 1000.