von Willebrand Modified Panel
0030284
Ordering Recommendation
Order in conjunction with Factor VIII Activity (0030095) for the workup of suspected von Willebrand disease.
Mnemonic
VW PANEL 2
Methodology
Platelet Agglutination/Microlatex Particle-Mediated Immunoassay
Performed
Mon-Sat
Reported
1-3 days  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
  
Collect
Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.  
Specimen Preparation
Transfer 1.5 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 1 mL)  
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.  
Unacceptable Conditions
Serum. Hemolyzed or non-frozen specimens.  
Remarks
  
Stability
Ambient: 4 hours; Refrigerated: Unacceptable; Frozen at -20°C: 3 months; Frozen at -70°C: 6 months   
Reference Interval
 
 
Test Number Components Reference Interval
0030285von Willebrand Factor Antigen 0-​6 years: 52-​214%
7-​9 years: 62-​180%
10-​11 years: 63-​189%
12-​13 years: 60-​189%
14-​15 years: 57-​199%
16-​17 years: 50-​205%
18 years and older: 52-​214%
0030250von Willebrand Factor Activity (Ristocetin Cofactor) 0-​6 years: 51-​215%
7-​9 years: 52-​176%
10-​11 years: 60-​195% 
12-​13 years: 50-​184%
14-​15 years: 50-​203 %
16-​17 years: 49-​204%
18 years and older: 51-​215%
Interpretive Data
 
Note
 
CPT Code(s)
85246; 85245
Components
Component Test Code*Component Chart Name
0030250von Willebrand Factor, Activity (RCF)
0030285von Willebrand Factor, Antigen
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Ristocetin Cofactor, Plasma
  • Von Willebrand Ag
  • von Willebrand Factor Activity
  • von Willebrand Factor Modified Panel
  • vwf Modified Panel