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© Diatron MI Ltd. 2005
4.3 Parameters
Abacus junior 5
measures and calculates 22 different parameters, listed
below. For each parameter, you can find name, abbreviation and measurement unit
in the first column. Also, a short description for each parameter in the second column.
White Blood Cells –
WBC
(cells/l, cells/µl)
Number of leukocytes
WBC = WBC
cal
x (cells/l, cells/µl)
Red Blood Cells –
RBC
(cells/l, cells/µl)
Number of erythrocytes
RBC = RBC
cal
x (cells/l, cells/µl)
Hemoglobin concentration -
HGB
(g/dl, g/l, mmol/l)
Measured photometrically at 540 nm; in each cycle blank
measurement is performed on diluent
HGB = HGB
cal
x (HGB
measured
– HGB
blank
)
Mean Corpuscular Volume -
MCV
(fl)
Average volume of individual erythrocytes derived from
the RBC histogram.
Hematocrit –
HCT
(percentage, absolute)
Calculated from the RBC and MCV values.
HCT
percentage
= RBC x MCV x 100
HCT
absolute
= RBC x MCV
Mean Corpuscular Hemoglobin –
MCH
(pg, fmol)
Average hemoglobin content of erythrocytes, calculated
from RBC and HGB values.
MCH = HGB / RBC
Mean Corpuscular Hemoglobin
Concentration –
MCHC
(g/dl, g/l, mmol/l)
Calculated from the HGB and HCT values.
MCHC = HGB / HCT
absolute
Unit of measurement is displayed according to the one
chosen for HGB result (g/dl, g/l or mmol/l)
Red Cell Distribution Width –
RDW-SD
(fl)
Platelet Distribution Width –
PDW-SD
(fl)
Red cell Distribution Width –
RDW-CV
(absolute)
Platelet Distribution Width –
PDW-CV
(absolute)
The distribution width of the erythrocyte or platelet
population derived from the histogram at 20% of peak
xDW-SD = RDW
cal
x (P2 - P1) (fl),
xDW-CV = RDW
cal
x 0.56 x (P2 - P1) / (P2 + P1)
by the factor of 0.56 CV is corrected to the 60% cut
Platelet –
PLT
(cells/l, cells/µl)
Number of thrombocytes (platelets)
PLT = PLT
cal
x (cells/l, cells/µl)
Mean Platelet Volume –
MPV
(fl)
Average volume of individual platelets derived from the
PLT histogram
Thrombocrit –
PCT
(percentage, absolute)
Calculated from the PLT and MPV values
PCT
percentage
= PLT x MPV x 100
PCT
absolute
= PLT x MPV
White blood cell, 3 part differential:
LYM (%)
: lymphocytes
MON (%)
: monocytes and some
eosinophils
NEU (%)
:
neutrophil granulocytes
Absolute values counted in the channels determined by
the three WBC discriminators:
Percentages calculated from absolute WBC value.
EOS, BAS (%)
:eosinophil and basophil
granulocytes
Each distribution curve represents the given population.
GRA
LYM
1.
2.
