ARUP's Laboratory Test Directory

von Willebrand Modified Panel : 0030284

Mnemonic: VW PANEL 2

Ordering Recommendation: Order in conjunction with Factor VIII Activity (0030095) for the workup of suspected von Willebrand disease.
Methodology: Platelet Agglutination/Microlatex Particle-Mediated Immunoassay
Performed: Mon-Sat
Reported: 1-3 days
Specimen Required: 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.

Stability (collection to initiation of testing): 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%

CPT Code(s): 85246; 85245
Cross References: von Willebrand Factor Modified Panel, vwf Modified Panel