T Cell Subsets
- Description
- This investigation allows enumeration of CD4+ (helper) and CD8+ (cytotoxic) T cells. This investigation is used for monitoring disease progression in HIV infection. The assay is performed using the accurate single platform technology and provides both percentage and absolute number of each subset.
- Clinical details
- Primary and secondary immunodeficiency
- Related condition
- Reference range
- Lymphocytes CD 3 %, 55 - 83 Lymphocytes CD 3 absolute counts, 700 - 2100 Lymphycytes CD 4 %, 28 - 57 Lymphocytes CD 4 absolute counts, 300 - 1400 Lymphocytes CD 8 %, 10 - 39 Lymphocytes CD 8 absolute counts, 200 - 900
- Units
- Absolute counts are in cells/µl Percentages are as listed.
- Testing site
- Synnovis : Reference Services : Blackfriars Hub
- Laboratory
- Diagnostic Immunology
- Sample type and volume required
- EDTA blood collection tube 4 ml EDTA Paediatric blood collection tube 1ml
- Special sample instructions
All tests are compromised by prolonged transit times. For this reason, date of bleed and date of postage must be provided with each request.
- Storage and transport
- Samples must NOT be refrigerated. Please state time of venesection on the request form. Samples are suitable for analysis up to 72 hours post venesection. Samples that arrive in lab after 72 hours will not be analysed. Courier transport to deliver directly to the Immunology laboratory is recommended. Packaging and samples must be labelled as "urgent-time sensitive assay" , and addressed to attention to Immunology Department.
- Turnaround time
- 3 working days Please Note: There is no laboratory service offered over bank holidays and weekends. Samples received in these periods will not be processed
- Time limit for extra tests
- *NO* tests can be added at any time