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

Methodology

Clotting/Platelet Agglutination/Microlatex Particle-Mediated Immunoassay
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Reference Range

See report
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Performing Laboratory

ARUP
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New York DOH Approval Status

Yes
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