Test Details
Mnemonic
VWPAR
Ordering Code
3689300
CPT-4 Code(s)
85240, 85245, 85246
Specimen Information
Patient Preparation
Collect using coagulation test collection methods.
Collect
Light blue sodium citrate
Specimen Preparation
Send 3.0 mL platelet-poor plasma in a screw capped plastic vial. CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Minimum Volume
1.0 mL
Transport Temperature
CRITICAL FROZEN
Rejection Criteria
Serum, EDTA plasma, clotted or hemolyzed specimens
Stability
Room temperature: 4 hours
Refrigerated: Unacceptable
Frozen: 3 months
Refrigerated: Unacceptable
Frozen: 3 months
Methodology
Clotting/Platelet Agglutination/Microlatex Particle-Mediated Immunoassay
Reference Range
See report
Performing Laboratory
ARUP
New York DOH Approval Status
Yes