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Test Name:

  • TMF No:
  • Performance Lab Name:
    Viracor Eurofins Clinical Diagnostics
  • Test Mnemonic:
  • CPT Code:
  • Ref Lab Test No:
  • Patient Prep:
    Draw Monday through Friday only. Viracor-IBT Laboratories must receive specimen within 30 hours of collection. Specimen must be drawn after 5:00 am (EST) and shipped on the same day to meet the 30 hour requirement. Remote clients should arrange for direct shipment to VIBT.
  • Spec Collect:
    Green top (sodium heparin) tube. Mix by gently inverting tube 8 times.
  • Spec Process:
    Transport 3 mL whole blood in the original collection tube. (Min: 2 mL)
    Ship at ambient temperature, Monday through Friday. Friday shipments must be labeled for Saturday delivery or specimens will not meet the 30 hour time requirement. All specimens must be labeled with patient's name, collection date and time. A Viracor-IBT test requisition form must accompany each specimen. Ship specimens FedEx Priority Overnight® to: Viracor-IBT Laboratories, 1001 NW Technology Drive, Lee's Summit, MO 64086
  • Spec Store Transport:
    Room temperature.
  • Spec Stability:
    Room temperature: 30 hours
    Refrigerated or Frozen: Unacceptable
  • Spec Reject:
    Whole blood frozen or received in transfer tube. Specimen will be rejected if greater than 30 hours old. Specimen type other than heparinized whole blood collected in sodium heparin tube.
  • Use:
    ImmuKnow is an immune cell function assay that detects cell-mediated immunity in an immunosuppressed population. The assay detects cell mediated immunity by measuring the concentration of ATP from CD4 cells following stimulation.
  • Clinical Significance:
    ImmuKnow technology combines cell stimulation, cell selection, and quantification of metabolic markers (ATP) to measure cell-mediated immunity. ImmuKnow measures early response to stimulation by detecting intracellular ATP synthesis in CD4 cells selected from blood by monoclonal antibody-coated magnetic beads. The amount of ATP present in stimulated blood specimens is a measure of lymphocyte activity. Since the CD4 lymphocytes orchestrate cell-mediated immunity responses through immunoregulatory signaling, the measurement of CD4 activation reflects the degree of immune function.
  • Additional Test Info:
    This test has not been cleared or approved for diagnostic use by the U.S. Food and Drug Administration.
  • Day Run:
  • Time Reported:
    36 to 48 hours from receipt of specimen at Viracor-IBT.
  • Test Type: