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Laboratory Test Directory

Perforin/Granzyme B


Name Method Department Units
Perforin/Granzyme B Flow cytometry
Send Out %

Battery Members

Intracellular expression of Perforin and Granzyme B in NK cells and CD8+ cells.

Specimen Requirements

Whole blood

Container Type Container Size Specimen Volume

Purple tube (EDTA)

3 mL 3 mL

Green tube (Sodium heparin), No Gel

3 mL 3 mL

Room temperature - 24 hour(s)

Specimen Preparation

  • Transport to laboratory as soon as possible
  • Do not refrigerate
  • Keep at room temperature

Reasons for Rejection

  • Wrong collection tube
  • Wrong temperature
  • Frozen specimen
  • Clotted specimen
  • Hemolyzed specimen
  • Centrifuged specimen
  • Refrigerated specimen


Can only be drawn Monday thru Thursday. All samples must be collected between 10:30 A.M. and 5 P.M. They must be received by Sendout lab by 5:10 P.M.(same day of collection) to ensure delivery to reference lab within 24 hours. Do not collect on a Friday.

CPT Code

  • 88184
  • 88185 (x4)
  • 88187