Common Laboratory Values
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REFERENCE MANUAL

V 34 / NO 6

12 / 13

Common Laboratory Values
CBC
Test

Normal value

Function

Significance

Hemoglobin

12-18 g/100 mL

Measures oxygen carrying capacity
of blood

Low: hemorrhage, anemia
High: polycythemia

Hematocrit

35%-50%

Measures relative volume of cells
and plasma in blood

Low: hemorrhage, anemia
High: polycythemia, dehydration

Red blood cell

4-6 million/mm3

Measures oxygen-carrying capacity
of blood

Low: hemorrhage, anemia
High: polycythemia, heart disease, pulmonary disease

White blood cell
Infant
4-7 y
8-18 y

8,000-15,000/mm3
6,000-15,000/mm3
4,500-13,500/mm3

Measures host defense against
inflammatory agents

Low: aplastic anemia, drug toxicity, specific infections
High: inflammation, trauma, toxicity, leukemia

Test

Normal value

Significance

Neutrophils

54%-62%

Increase in bacterial infections, hemorrhage, diabetic acidosis

Lymphocytes

25%-30%

Viral and bacterial infections, acute and chronic lymphocytic leukemia, antigen reaction

Eosi