CD4/CD8 Ratio for BAL
Also known as: CD4/CD8 for Bronchoalveolar Lavage
Use
The CD4/CD8 Ratio test for BAL specimens is used to evaluate the immune response within the lung. The presence and ratio of lymphocytes, specifically CD4+ and CD8+ T cells, can provide insights into conditions such as sarcoidosis and other interstitial lung diseases.
Special Instructions
Markers included in this test are CD3, CD4, CD8, and CD45. This test is not intended for quantitative immune status monitoring. It is available as a global test only for bronchoalveolar lavage (BAL) specimens.
Limitations
This test does not offer a quantitative measure of immune status and is not suitable for generalized immune monitoring. The test cannot be ordered as tech-only since it includes no separate professional component.
Methodology
Cell-based / Cytometry (Flow Cytometry)
Biomarkers
Result Turnaround Time
24 hours
Related Documents
For more information, please review the documents below
Specimen
Bronchoalveolar Lavage
Volume
10-50 ml
Minimum Volume
Not provided
Collection Instructions
Exclude biopsy needles, blades, and other foreign objects from transport tubes to maintain specimen viability and safety.
Storage Instructions
Specimens should be refrigerated and received within 72 hours. New York samples must be received within 48 hours.
Stability Requirements
| Temperature | Period |
|---|---|
| Frozen | Do not freeze. |