Laboratory Services
CD4 Count for Immune Monitoring, Blood
Print this pageUpdated Test Information:
| Test Description |
CD4 Count for Immune Monitoring, Blood
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|---|---|---|
| Synonym(s) |
CD4 Count, CD8 Count, Flow Cytometry, Helper Suppressor Ratio, Immune Competence, Immune Status-Flow Cytometry, Immunodeficiency Panel-Flow Cytometry, Quantitative CD4 and CD8, T Cell, T Cells, T Lymphocyte Surface Markers, T-Cell Surface Markers, T-Cells, T-Helper/T-Suppressor-Flow Cytometry, T4/T8 Helper Suppressor Ratio, AIDS (Acquired, Immune Deficiency Syndrome) |
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| Test ID |
TCD4
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| Performing Lab |
Labcorp |
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| General Information |
Serial monitoring of CD4 T cell count in HIV-positive patients Useful for follow-up and diagnostic evaluation of primary cellular immunodeficiencies, including severe combined immunodeficiency T-cell immune monitoring following immunosuppressive therapy for transplantation, autoimmunity, and other immunological conditions where such treatment is utilized Assessment of T-cell immune reconstitution post hematopoietic cell transplantation Early screening of gross quantitative anomalies in T cells in infection or malignancies |
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| Container Type |
Lavender-top (EDTA) tube AND yellow-top (ACD-A or ACD-B) tube |
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| Specimen Type |
Whole Blood EDTA |
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| Specimen Requirements |
3mL Lavender top EDTA. Collect Monday-Thursday only. Sample must be received by Labcorp within 72 hours of collection |
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| Specimen Collection / Processing Instructions |
Send specimen in original tube. Do not aliquot. Do not collect on Friday or Saturday. |
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| Minimum Sample Volume |
0.2mL |
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| Stability |
Maintain specimen at room temperature. Do NOT freeze or refrigerate. Yellow-top (ACD-A) or (ACD-B) tube: 2 days Lavender |
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| Unacceptable Specimen Conditions |
Gross hemolysis, gross lipemia |
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| Methodology |
Flow Cytometry, Single Platform (CD3, CD4, CD8, CD45) |
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| Estimated TAT |
1-2 days |
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| Testing Schedule |
Monday through Sunday |
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| Test Includes |
CD45 Total Lymph Count, % CD3 (T Cells), CD3 (T Cells), % CD4 (T Cells), CD4 (T Cells), % CD8 (T Cells), CD8 (T Cells), 4/8 Ratio |
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| CPT Code(s) |
86359-T cells, total count 86360-Absolute CD4/CD8 count with ratio |
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| Reference Range |
The appropriate age-related reference values will be provided on the report. |
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| LOINC Code(s) |
80721-4 |
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| Additional Information |
