Ordering Recommendation
Not recommended except in suspected cases of acquired von Willebrand disease (VWD) or high suspicion of VWD. Preferred initial test is von Willebrand Panel with Reflex to von Willebrand Multimeric Analysis (2003387).
Mnemonic
Methodology
Electrophoresis/Clotting/Microlatex Particle-Mediated Immunoassay/Platelet Agglutination
Performed
Mon-Sat
Reported
1-11 days
New York DOH Approval Status
Specimen Required
Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.
Transfer 3 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 1.5 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
Reference Interval
Test Number |
Components |
Reference Interval |
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Factor VIII, Activity |
|
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von Willebrand Factor, Antigen |
|
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von Willebrand Factor, Activity (RCF) |
|
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von Willebrand Multimeric | Normal |
Interpretive Data
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.
Laboratory Developed Test (LDT)
Note
Hotline History
CPT Codes
85247; 85240; 85246; 85245
Components
Component Test Code* | Component Chart Name | LOINC |
---|---|---|
0030003 | von Willebrand Multimeric | 32217-2 |
0030095 | Factor VIII, Activity | 3209-4 |
0030250 | von Willebrand Factor, Activity (RCF) | 6014-5 |
0030285 | von Willebrand Factor, Antigen | 27816-8 |
Aliases
- Factor VIII
- Factor VIII, Activity
- RCF
- Ristocetin Cofactor
- von Willebrand Factor, Activity
- von Willebrand Factor, Antigen
- von Willebrand Multimeric
- vW Activity
- vW multimeric
- vWAg
- VWF:A
- VWF:Rco