ARUP's Laboratory Test Directory
| 0030285: von Willebrand Factor Antigen |
| Test Mnemonic: VWF/AG | |
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Methodology: Microlatex Particle-Mediated Immunoassay
Performed: Mon, Wed, Fri Reported: 1-4 days |
| Specimen Required: | |
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Collect: One 5 mL lt. blue (sodium citrate). Refer to the Hemostasis/Thrombosis Specimens section in the front of this User's Guide for specimen collection instructions.
Transport: 2 mL platelet-poor plasma, frozen. (Min: 1 mL) Submit specimen in an ARUP Standard Transport Tube. Pediatric Collection/Transport: 1 mL platelet-poor plasma, frozen. Remarks: CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. Unacceptable Conditions: Serum. Nonfrozen or hemolyzed specimens. Stability: Ambient: 4 hours; Refrigerated: 8 hours; Frozen: 2 weeks |
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| Reference Interval: |
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0-6 years: 51-185% 7-9 years: 62-176% 10-11 years: 61-201% 12-13 years: 61-186% 14-15 years: 57-204% 16-17 years: 51-211% 18 years and older: 51-185% |
| CPT Code(s): | |
| 85246 |