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Factor VIII, Activity
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Order to diagnose hemophilia A, acquired factor VIII deficiency, or as part of a diagnostic workup for von Willebrand disease (VWD). Also useful for monitoring treatment in patients with factor VIII deficiency or VWD. Not recommended when screening for thrombophilia.
Electromagnetic Mechanical Clot Detection
Mon-Sat
1-3 days
Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.
Transfer 2 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 1 mL)
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Serum. EDTA plasma, clotted or hemolyzed specimens.
Ambient: 4 hours; Refrigerated: Unacceptable; Frozen at -20° C: 3 months; Frozen at -70° C: 6 months
| Age | Reference Interval |
|---|---|
| 0-6 years | 56-191% |
| 7-9 years | 76-199% |
| 10-11 years | 80-209% |
| 12-13 years | 72-198% |
| 14-15 years | 69-237% |
| 16-17 years | 63-221% |
| 18 years and older | 56-191% |
No compliance statements are in use for this test.
85240
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 0030095 | Factor VIII, Activity | 3209-4 |
- AHF
- Antihemophilic Factor (AHF), Factor VIII:C (Coagulant Portion)
- Coagulation Factor VIII Activity Assay, Plasma
- Factor VIII Activity Assay
- Intrinsic Factor Proteins
- Intrinsic Factors
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