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Laboratory Test Directory

Factor VIII, Quantitative

Components

Name Method Department Units
Quantitative Factor VIII Clot detection
Core Lab, Coagulation %

Specimen Requirements

Platelet poor plasma

Container Type Container Size Specimen Volume
Preferred

Blue plastic tube (Citrate)

2.7 mL 2.7 mL
Stability

Frozen - 2 week(s)

Alternate

Blue plastic tube (Citrate)

1.8 mL 1.8 mL
Stability

Frozen - 2 week(s)

Specimen Preparation

  • Fill tubes to appropriate mark.
  • Mix by gentle inversion immediately after collection
  • Centrifuge, remove plasma/serum and freeze
  • Plasma must be platelet free

Reasons for Rejection

  • Over or under filled tube
  • Clotted specimen
  • Not received within specified time frame
  • Gross hemolysis
  • Wrong collection tube
  • Capillary specimen
  • Specimen collected in glass tube

Comments

Please indicate on the label the collection method, i.e. line draw with heparin, line draw without heparin, venipuncture. Also indicate whether or not the patient is on coumadin or heparin therapy. Centrifuge citrate tubes according to Lab policy, remove platelet-poor plasma, pool the plasma, aliquot and freeze. Send a minimum of two (2) aliquots of plasma. Cord blood may be submitted for testing. If sending platelet poor plasma from cord blood, process the sample the same as if it is whole blood.

CPT Code

  • 85240