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T and B Cells, Total
Test Code39588
CPT Codes
86355, 86359
Includes
Absolute Lymphocytes, Absolute CD19+ Cells, % CD19 (B Cells), Absolute CD3+ Cells, % CD3 (Mature T Cells)
Preferred Specimen
5 mL whole blood collected in an EDTA (lavender-top) tube
Minimum Volume
0.5 mL
Other Acceptable Specimens
EDTA (lavender-top) - pediatric tube
Instructions
Do not freeze. Do not transfer whole blood to M4. Submit the preferred EDTA tubes at room temperature. Volumes less than 1 mL should be submitted in a pediatric EDTA tube.
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 72 hours
Refrigerated: Unacceptable
Frozen: Unacceptable
Refrigerated: Unacceptable
Frozen: Unacceptable
Methodology
Flow Cytometry (FC)
Setup Schedule
Set up: Daily; Report available: 2-3 days
Clinical Significance
Low numbers of NK cells are found in individuals who are susceptible to viral infections, including cytomegalovirus and varicella
