von Willebrand Modified Panel : ARUP Lab Tests

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von Willebrand Modified Panel : 0030284

Mnemonic: VW PANEL 2

Methodology:	Platelet Agglutination/Microlatex Particle-Mediated Immunoassay (LIA)
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 4 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 2 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: 2 weeks

Reference Interval:

Test Number	Components	Reference Interval
0030285	von 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%
0030250	von 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 vWF/Ag; 85245 vWF/RCF

Cross References:

von Willebrand Factor Modified Panel, vwf Modified Panel

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