Factor VIII Activity, Clotting

Factor VIII Activity, Clotting

Preferred Specimen(s) 1.0 mL Citrate Plasma

Instruction Give detail of Oral Anticoagulant Therapy

Transport Container Plastic screw cap vial

Transport Temperature Frozen

Reject Criteria

• Grossly hemolyzed,
• lipemic specimens

Methodology Coagulation

Clinical Significance This test is useful to evaluate a prolonged aPTT. The most common form of hemophilia is caused by deficiency of factor VIII. Hemophilia A is an x-linked disorder affecting between 1 in 5,000 to 10,000 males.

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