Casandra
Casandra Test Code QD35760Version 1 (DRAFT)
Performing Lab
T and B Cells, Total
Clinical Use
Order TestUse
Quantitative measurement of peripheral blood lymphocyte subsets—specifically total T cells (CD3+), total B cells (CD19+), and total lymphocytes—provides crucial information for assessing immune system status and aiding in the evaluation of immunodeficiency, immune suppression, infection or hematologic conditions.
Special Instructions
Not provided.
Limitations
Not provided.
Test Details
Methodology
Cell-based / Cytometry (Flow Cytometry)
Biomarkers
CD19 (B Cells)
Cell Type% CD19 (B Cells)
Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Absolute CD19+ Cells
Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
CD3 (Mature T Cells)
Cell Type% CD3 (Mature T Cells)
Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Absolute CD3+ Cells
Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Lymphocytes
Cell TypeAbsolute Lymphocytes
Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
LOINC Codes
Order Codes
- 731-0 - Lymphocytes # Bld Auto
- 8116-6 - CD19 Cells # Bld
- 8117-4 - CD19 Cells NFr Bld
- 8122-4 - CD3 Cells # Bld
- 8124-0 - CD3 Cells NFr Bld
Result Turnaround Time
2-3 days
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Whole Blood
Volume
0.5–5 mL
Minimum Volume
0.5 mL
Container
Lavender (EDTA)
Collection Instructions
Volume less than 1 mL should be submitted in a pediatric EDTA (lavender‑top) tube.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 72 Hours |
| Refrigerated | Unacceptable |
| Frozen | Unacceptable |
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