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Natural Killer Cells, Functional
88184, 88185 (x2)
10 mL whole blood collected in a sodium heparin (green-top) tube. Whole blood must be transported at room temperature and delivered to the testing laboratory preferably within 48 hours after collection. Submit Monday through Thursday only.
Maintain and transport blood at room temperature. Avoid temperatures <15° C and >37° C. In hot weather, it may be necessary to pack the specimen in a container with insulating material around it and place this container inside another one that contains a cold pack (ice pack) and absorbent material. This method will help retain the specimen at ambient temperature.
For longitudinal studies, draw specimens at the same time of day to minimize diurnal variation.
Sodium heparin (green-top) tube
Received refrigerated • Received frozen
Flow Cytometry (FC)
|Decreased Activity||<7 LU30|
|Normal Activity||7-125 LU30|
|Increased Activity||>125 LU30|
Natural killer cells (NK cells) are a subset of non-B, non-T peripheral blood lymphocytes that appear to play a crucial role in the human innate immune response. The function of NK cells is important for the clearance of tumor cells, for the removal of immunoglobulin-bound antigens, and for the control of viral infections. NK function has been reported to be decreased in certain individuals, including those with primary immunodeficiencies, those with late-stage human immunodeficiency virus infections, and pregnant women.
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
(The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.)
* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.