Perox No Valley (Px-Nv, Vx) - Siemens ADVIA 2120 Operator's Manual

The Perox Rate Histogram displays the arrival rate of the cells in the perox
channel.
Normal Perox Rate Histogram PXIFR Perox Rate Histogram
Results Flagged
WBCP, %NEUT, #NEUT, %LYMPH, #LYMPH, %MONO, #MONO, %EOS,
#EOS, %LUC, and #LUC
Corrective Action
1. Check perox reagents.
2. Check perox hydraulics and sample delivery.
3. Check sheath delivery.
4. Check the pressure and vacuum readings.

Perox No Valley (PX-NV, VX)

Definition
The Perox No Valley flag is triggered if there is no valid separation between the
noise and lymphocyte populations in the Perox cytogram.
The separation of the noise and lymphocyte populations along the y axis of the
Perox cytogram is evaluated by the relative depth of the valley (PEROX d/D)
between the two populations.
In normal samples, PEROX d/D is greater than 0.15. This flag is triggered if
PEROX d/D is less than 0.15.
Normal PX-NV (VX) Flag
1 Noise peak
2 Lymph peak
Noise-Lymph Noise-Lymph
The PX-NV (VX) flag is not triggered if agreement between the baso and perox
results is indicated by both the following conditions:
Flags 6-35