Siemens ADVIA 2120, Руководство оператора, Страница: 315 / 477

8-46 Methods
Since the histogram analysis uses calibration factors that are not applied to the
RBC V/HC cytogram, there can be a discrepancy between the RBC matrix values
and the corresponding %Micro, %Macro, %Hypo, and %Hyper values obtained
from the histograms based on the value of the calibration factors. The closer the
MCV and CHCM calibration factors are to 1.0, the smaller the discrepancies are.
Platelet X Histogram
The Platelet X histogram is
a 100-channel display of
the high-angle (5° to 15°),
high-gain light scatter
measurements that
corresponds to the x axis on
the PLT Scatter cytogram.
Platelet Y Histogram
The Platelet Y histogram is
a 100-channel display of
the low-angle (2° to 3°),
high-gain light scatter
measurements that
corresponds to the y axis on
the PLT Scatter cytogram.
Platelet VOL Histogram
The Platelet VOL histogram
of the two-dimensional PLT
analysis shows the
distribution of cells by
volume. Volume data are
obtained from the integrated
analysis.
The histogram has a range of 0 fL to 60 fL. Large platelets with volumes up to 60
fL are included in the PLT count.
NOTE:
Whenever the ratio of RBC fragments to platelets exceeds 0.25, the
system uses the log normal fit calculation to determine the platelet count, and the
log normal fit curve appears on the Platelet Volume histogram. Platelet PM
Histogram
The Platelet PM histogram
of the two-dimensional
PLT analysis shows the
distribution of platelets by
the platelet dry mass (PM).