Siemens ADVIA 2120, Operator'S Manual, Page: 329 / 477

8-60 Methods
RETIC Abs Flatness Histogram
The RETIC Abs Flatness
histogram data consists of
50 points, one taken every
200 milliseconds. Each
point represents the mean
absorption for the last 200
milliseconds.
This histogram provides a visual indication of the absorption signal "flatness" to
monitor the laser performance. Laser oscillation can cause an erratic presentation.
RETIC Abs Histogram
The RETIC Abs histogram
represents the distribution
of mature RBCs and
reticulocytes according to
their corrected absorption
values.
Absorption correction compensates for drift in the absorption channel optics and
for scattered light that is not collected.
RETIC Volume Histogram
The RETIC Volume histogram represents the overlaid distributions of mature
RBCs and reticulocytes by cell size only. The histogram has a range from 0 fL to
200 fL. The displayed data includes the MCVg calibration factor.
Mature RBC population
(red)
Reticulocyte population
(blue)
RETIC Volume Histogram Parameters
%MACROr Percentage of reticulocyte population with cell
volumes greater than 120 fL
%MACROm Percentage of mature RBC population with cell
volumes greater than 120 fL
%MACROg Percentage of gated cell population with cell
volumes greater than 120 fL
%MICROr Percentage of reticulocyte population with cell
volumes less than 60 fL