T-cell, B-cell and NK-cell enumeration
CD4, B cell and NK subsets
Flow cytometry, multiparameter analysis
* Performed by affiliate laboratory
4 mL (min. 0.5mL) whole blood EDTA (Lavender), K EDTA (pink), or sodium or lithium heparin (green)
Ship ambient. Protect from extreme temperature with an ice pack. Separate ice pack from specimen.
Clotted or hemolyzed specimens. Refrigerated: Unacceptable; Frozen: Unacceptable.
This test is used to evaluate immunologic status using flow cytometry to quantify lymphocyte subsets. Clinicians order this test for primary immunodeficiencies, initial work up for HIV patients and in situations of immune dysfunction. CD4 extended provides clinicians with a quantitative analysis of the following major lymphocyte subsets; T-cells, B-cells and NK-cells (natural killer). In addition to the reported parameters of CD4, percentages are reported for CD19+ B-cells and CD56+ natural killer cells.