Diatron Abacus 5 - Parameter Calculation

147
22.5 Parameter Calculation
Parameter
Description
Units
Calculation
WBC
Leukocyte (white blood
cells) concentration
10
3/
µl or 10
9
/l
WBC = WBC
CAL
x WBC
MEASURED
NEU
LYM
MON
EO
BAS
Neutophil,
Lymphocyte,
Monocyte,
Eosinophil and
Basophil concentration
10
3/
µl or 10
9
/l
Calculated from differential percentage and WBC
NEU% x WBC
LYM% x WBC
MON% x WBC
EO% x WBC
BAS% x WBC
NEU%
LYM%
MON%
EO%
Neutophil,
Lymphocyte,
Monocyte and
Eosinophil five part
differential percentage
%
Relative value are derived from the optical 4 diff
scatter populations
BAS%
Basophil five part
differential percentage
%
Relative value is calculated from the basophil
optical scatter populations
RBC
Erythrocyte (red blood
cells) concentration
10
6
/µl or 10
12
/l
RBC = RBC
CAL
x RBC
MEASURED
HGB
Hemoglobin concentration
g/dl or g/l
Measured photometrically at a wavelength of 568
nm; blank measurement is performed per cycle on
diluent and lyse mixture
HGB = HGB
CAL
x (HGB
MEASURED
– HGB
BLANK
)
HCT
Hematocrit
%
Calculated from RBC and MCV
HCT = RBC x MCV x 100
MCV
Mean Corpuscular Volume
fl
Average volume of individual erythrocytes derived
from the RBC histogram
MCH
Mean Corpuscular
Hemoglobin
pg
Average hemoglobin content of erythrocytes,
calculated from RBC and HGB values.
MCH = HGB / RBC
MCHC
Mean Corpuscular
Hemoglobin Concentration
g/dl or g/l
Calculated from HGB and HCT
MCHC = HGB / (HCT / 100)
RDWsd
Red Cell Distribution Width
fl
Calculated from RDWcv and the distribution width
of the erythrocyte histogram at 20% of peak
RDWsd = RDWcv x (P
2
+ P
1
) / 0.56
RDWcv
Red Cell Distribution Width
CV
%
Derived from the distribution width of the
erythrocyte histogram at 20% of peak
RDWcv = RDW
CAL
x 0.56 x (P
2
- P
1
) / (P
2
+ P
1
)
Factor of 0.56 converts measurement at 60% of
peak to 20% of peak
PLT
Platelet (thrombocyte)
concentration
10
3/
µl or 10
9
/l
PLT = PLT
CAL
x PLT
MEASURED
PCT
Thrombocrit
%
Calculated from PLT and MPV
PCT = PLT x MPV x 100
MPV
Mean Platelet Volume
fl
Average volume of individual platelets derived
from the PLT histogram