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PN 4237523A
3-15
OPERATION PRINCIPLES
PARAMETERS AND THEIR DERIVATION
3
White Blood Cell (WBC) Count
This is the number of leukocytes measured directly, multiplied by the calibration constant,
and expressed as
Red Blood Cell (RBC)
This is the number of erythrocytes measured directly, multiplied by the calibration constant,
and expressed as
Hemoglobin (Hgb) Concentration
Weight (mass) of hemoglobin determined from the degree of absorbance found through
photocurrent transmittance is:
Mean Corpuscular Volume (MCV)
This is the average volume of individual erythrocytes derived from the RBC histogram. The
system:
r
Multiplies the number of RBCs in each channel by the size of the RBCs in that channel.
r
Adds the products of each channel between 36 fL and 360 fL.
r
Divides that sum by the total number of RBCs between 36 fL and 360 fL.
r
Multiplies by a calibration constant and expresses MCV in femtoliters.
Hematocrit (Hct)
This is the relative volume of packed erythrocytes to whole blood, computed as:
Mean Corpuscular Hemoglobin (MCH)
This is the weight of hemoglobin in the average erythrocyte count, computed as:
WBC
n
10
3
cells
µ
L
---------------------
×
=
RBC
n
10
6
cells
µ
L
---------------------
×
=
Hgb (g/dL)
Constant
log
10
Reference %T
Sample %T
----------------------------------
×
=
Hct (%)
RBC
MCV
×
10
---------------------------------
=
MCH (pg)
Hgb
RBC
------------
10
×
=
Summary of Contents for HmX Hematology Analyzer
Page 4: ...PN 4237523A iv REVISION STATUS ...
Page 14: ...PN 4237523A xiv CONTENTS ...
Page 18: ...PN 4237523A xviii INTRODUCTION COMPUTER PROGRAM STATEMENT ...
Page 28: ...PN 4237523A 1 10 USE AND FUNCTION MATERIAL SAFETY DATA SHEETS MSDS ...
Page 34: ...PN 4237523A 2 6 INSTALLATION INTERUNIT CONNECTIONS ...
Page 52: ...PN 4237523A 3 18 OPERATION PRINCIPLES PARAMETERS AND THEIR DERIVATION ...
Page 70: ...PN 4237523A 4 18 SPECIFICATIONS CHARACTERISTICS INTERFERING SUBSTANCES ...
Page 78: ...PN 4237523A 6 4 REPORTING OPTIONS GRAPHIC FORMAT ...
Page 84: ...PN 4237523A 7 6 BAR CODE SPECIFICATIONS BAR CODE DECODER ...
Page 98: ......
Page 110: ...PN 4237523A 8 GLOSSARY GLOSSARY ...
Page 124: ...PN 4237523A 14 INDEX INDEX ...
Page 126: ......