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.