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Laboratory Test Directory

Platelet Markers


Name Method Department Units
Platelet Markers Flow cytometry
Core Lab, Flow Cytometry %

Battery Members

CD41, CD42b, CD61

Specimen Requirements

Whole blood

Container Type Container Size Specimen Volume

Purple tube (EDTA)

3 mL 3mL

Blue plastic tube (Citrate)

2.7 mL 2.7mL

Room temperature - 24 hour(s)

Specimen Preparation

  • Do not centrifuge
  • Fill tubes to appropriate mark.
  • Mix by gentle inversion immediately after collection
  • Transport to laboratory as soon as possible
  • Keep at room temperature

Reasons for Rejection

  • Clotted specimen
  • Not received within specified time frame
  • Refrigerated specimen
  • Centrifuged specimen
  • Not received at proper temperature
  • Wrong collection tube
  • Specimen collected in glass tube


Patients with thrombocyotopenia may not yield enough platelets for testing. Recent platelet transfusion will affect results. A Pathologist consult (billed from Pediatric Pathology Associates (PPAC)) will be ordered and charged to the patient if abnormal results are obtained.

CPT Code

  • 88184
  • 88185 (x2)