VON WILLEBRAND FACTOR ANTIGEN

Test Documentation
Specimen Required
Draw blood in a light blue sodium citrate tube. See appendices for coagulation test collection instructions. Send 1.5 mL plasma (1.0 mL minimum) frozen in a screw-capped plastic vial. CRITICAL FROZEN.

Rejection Criteria
Serum, non-frozen or hemolyzed specimens

Methodology
Microlatex Particle-Mediated Immunoassay

Stability
Room Temperature: 4 hours; Refrigerated: Unacceptable; Frozen: 3 months

Reference Range
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%  

Performed
Monday-Saturday

Turnaround Time4-6 days
Test CodeWVFAP
CPT-4 Code (s)
85246
LOINC Codes
27816-8

Warde
Medical
Laboratory