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General Information
Alias: White blood cell count, white blood cell, white cell, white
Performed: 24 hrs.
Turn Around Time: Med Emerg: 60 minutes; Routine: 4 hrs
CPT Codes: 85048
Performed By: Hematology
Notes:
Part of CBC and CBC with diff. May be ordered as an individual test. A Pathologist Referral will be performed if established criteria are present and further evaluation and/or interpretation is needed.
Testing is also performed in the Rapid Response Lab.
Clinical Utility: Characteristics that may affect test results: lipemia, icterus, hemolysis, and cold agglutinins.
Link:
CBC and Differential Reference Ranges
Unacceptable Conditions:
• Those containing clots
• Substandard mixing or collection
• Expired or improperly stored collection tubes
• Improperly filled tubes based on collection tube manufacturer’s
guidelines
• Specimens contaminated with IV fluid
• Hemolyzed
• Improperly labeled
Components
Name |
Method |
Sex |
Age Range |
Ref. Range Low |
Ref. Range High |
Units |
NRBC Pct |
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WBC |
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See above link to CBC and Differential Reference Ranges document to view reference range values and units of measure for all components of the CBC. |
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Specimen Requirements
Type |
Container |
Volume |
Units |
Collection / Delivery |
Storage / Transport |
Off Campus |
Blood |
Lavender EDTA(K2), 4mL |
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Fill tube to mark. Send to lab within 24 hours of collection |
Room Temperature |
Send refrigerated to lab within 24 hours of collection |
Blood |
Lavender 0.5 mL mini-collect. |
Must have 0.5 mL volume in lavender 0.5 mL mini-collect. |
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