Item Added
Detail Description
Clinical Significance
White Blood Cell Count (WBC) - Most commonly utilized test to monitor characteristic response to infection. Diagnostically useful for diseases such as leukemia, leukocyte disorders, as well as monitoring therapy of these diseases.
Preferred Specimen(s)
Whole blood from a full EDTA (lavender-top) tube
Minimum Volume
Microtainer 500 uL
1 mL whole blood from an EDTA (lavender-top) tube
Collection Instructions
Maintain specimen at room temperature. Do not refrigerate. If multiple draw, collect EDTA (lavender-top) tube last. Mix by gently inverting 8 times. Traumatic draw can introduce thromboplastin and trap WBC and platelets. Refrigeration can precipitate fibrin and trap WBC and platelets.
Transport Container
EDTA (lavender-top) tube
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 48 hours
Reject Criteria
Hemolysis • Clotted
Methodology
Electronic Cell Sizing/Counting/Cytometry/Microscopy
Reference Range(s)
≤2 Weeks 9.0-30.0 Thousand/µL
3 Months 5.0-19.5 Thousand/µL
1 Year 6.0-17.5 Thousand/µL
2 Years 6.0-17.0 Thousand/µL
6 Years 5.0-16.0 Thousand/µL
12 Years 4.5-13.5 Thousand/µL
18 Years 4.5-13.0 Thousand/µL
>18 Years 3.8-10.8 Thousand/µL
Alternative Name(s)
WBC,Leukocyte Count