Complete Blood Count (CBC) |
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The CBC includes: hemoglobin, hematocrit, red blood cell (RBC) count, white blood cell (WBC) count, RBC indices, platelet count, and red cell distribution width (RDW). The hemoglobin, WBC count, RBC count, mean corpuscular volume (MCV), and platelet count are measured electronically by a Coulter Cell Counter. The hematocrit, mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC) and RDW are calculated.
The reference ranges and critical values are:
Parameter |
Reference Range |
Critical Value |
WBC |
4,000 - 11,000/uL |
<1,000/uL
>50,000/uL (if first diagnosis)
>100,000/uL (known patient) |
RBC |
Males 4.31 - 5.84 mil/uL
Females 4.00 - 5.00 mil/uL |
|
Hemoglobin |
Males 13.0 - 17.0 g/dL
Females 12.0 - 15. 0 g/dL |
<6.0 g/dL |
Hematocrit |
Males 40 - 50%
Females 36 - 45% |
<15%
>70% neonates
>60% all others |
MCV |
80 - 99 fL |
|
MCH |
27 - 34 pg |
|
MCHC |
32 - 36% |
|
RDW |
<14.5% |
|
Platelet Count |
140,000 - 400,000/uL |
<30,000/uL
>1 million/uL |
Reference range for the WBC differential count is:
White Cell |
Relative |
Absolute |
Bands |
0 - 14% |
N/A |
Neutrophils |
45 - 78% |
1.7 - 6.8 th/uL |
Lymphocytes |
15 - 47% |
1.0 - 3.3 th/uL |
Monocytes |
0 - 12% |
0.2 -0.9 th/uL |
Eosinophils |
0 - 7% |
0.0 - 0.4 th/uL |
Basophils |
0 - 2% |
0.0 - 0.2 th/uL |
Specimen requirement is one lavender top (EDTA) tube.
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