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Helper, Suppressor and Total T cells
|Test code||THID (with CBC & diff)|
|In House Availability||Monday-Saturday (day shift)|
|Collection Instructions||Keep sample at room temperature|
|Container type||Lavender top|
|Amount to Collect||3 mL blood|
|Sample type||EDTA whole blood|
|Preferred volume||3 mL blood|
|UCSF Rejection Criteria||Refrigerated sample received. Sample > 48 hours old when received|
|Processing notes||DO NOT refrigerate, store at room temperature and ship to China Basin.
Order CBCD if not already ordered on the same sample.
|Units||% and x106cells/L|
CD4 / CD8 (Helper/Supressor) ratio: 0.7-3.9
Note: Reference values are for ≥ 18 year olds. For pediatric ranges please see:
Kotylo, PA, et al. 1993. Reference ranges for Lymphocyte Subsets in Pediatric Patients. Am. J. Clin. Pathol 100:111-115
Lin, S-C., et al. 1998. Age-Related Changes in Blood Lymphocytes of Chinese Children. Ped. Allergy Immunol. 9:215-220
Melaranci, C., et al. 1992. T. Cell Subpopulations in Pediatric Healthy Children: age-normal values. J. Clin. Lab. Immunol. 30:143-149
|Synonyms||CD4; CD8; CD3; Inducer; Cytotoxic; T cells; CD4/CD8; flow cytometry|
|Turn around times||2-3 days|
|Additional information||Both CD3 (total % T cells), CD3/CD4 (% Helper-Inducer T cells) and CD3/CD8 (% Suppressor-Cytotoxic T cells) are reported as well as the CD4/CD8 ratio.
Absolute cell counts require a CBC w/Differential on the same sample, which is ordered and charged separately if not otherwise available.
Note: In a legal opinion given to the Medical Center, attempting to circumvent a patient's refusal of HIV testing by using CD4 in its place is an (illegal) invasion of the patient's privacy unless a consent for HIV Testing is obtained.
CD4 results are automatically forwarded to California public health per regulations. However, this does not absolve the ordering provider from any additional reporting if such is required.
|CPT coding||86360; 86359
|Last Updated||6/21/2016 13:59:08|