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).
Electrophoresis/Clotting/Microlatex Particle-Mediated Immunoassay/Platelet Agglutination
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
|von Willebrand Multimeric||Normal|
|0030095||Factor VIII, Activity||
|0030285||von Willebrand Factor Antigen||
|0030250||von Willebrand Factor Activity (Ristocetin Cofactor)||
Compliance Statement D: For laboratory tests using a manufactured RUO kit. This test was developed and its performance characteristics determined by ARUP Laboratories. The U. S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.
85247; 85240; 85246; 85245
|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|
- Factor VIII
- Factor VIII, Activity
- Ristocetin Cofactor
- von Willebrand Factor, Activity
- von Willebrand Factor, Antigen
- von Willebrand Multimeric
- vW Activity
- vW multimeric