Perox Noise (Px-No, Nx) - Siemens ADVIA 2120 Operator's Manual

•
WBCB and WBCP agree within specified limits (No WBC-CE flag)
•
[(%NEUT + %EOS) - %PMN] is between 0 and 7.5
Results Flagged
WBCP, %NEUT, #NEUT, %LYMPH, #LYMPH, %MONO, #MONO, %EOS,
#EOS, %LUC, and #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
1. Check perox reagents.
2. Check peroxidase hydraulics and sample
delivery.
3. Check delivery of SHEATH/RINSE.
4. Check PEROX SHEATH delivery.
5. Check the pressure and vacuum readings.
6. Check the perox reaction chamber
temperature.
7. Check perox flowcell alignment.
8. Check perox gains.

Perox Noise (PX-NO, NX)

Definition
The Perox Noise flag is triggered if 60% or more of the perox signals come from
the Noise area of the Perox cytogram.
This flag is triggered if 60% or more of the PEROX events are counted in the
Noise area.
6-36
Sample Related
•
Neonatal samples
•
Aged blood sample
•
Malaria parasites
Flags