Ordering Recommendation

Recommended panel for the initial workup of suspected von Willebrand disease.

Mnemonic
VW PANEL
Methodology

Electromagnetic Mechanical Clot Detection/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.
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 3 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, EDTA plasma, clotted or hemolyzed 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
0030095 Factor VIII, Activity
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%

0030285 von Willebrand Factor Antigen
Age Reference Interval
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%

0030250 von Willebrand Factor Activity (Ristocetin Cofactor)
Age Reference Interval
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



No compliance statements are in use for this test.

Note
Hotline History
N/A
CPT Codes

85240; 85246; 85245

Components
Component Test Code* Component Chart Name LOINC
0030095 Factor VIII, Activity 3209-4
0030250 von Willebrand Factor, Activity (RCF) 6014-5
0030285 von Willebrand Factor, Antigen 27816-8
* 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
  • F8 Activity
  • Factor VIII activity
  • Factor VIII Studies
  • von Willebrand Factor Panel
  • von Willebrand Factor, Activity; RCF
  • von Willebrand Factor, Antgien
  • vWF Ag
  • vWF Panel
von Willebrand Panel