Test Details

Mnemonic

VWFAR

Ordering Code

3619200

CPT-4 Code(s)

85245

Specimen Information

Patient Preparation

Follow coagulation testing collection methods in appendices.
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Collect

Light blue sodium citrate
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Specimen Preparation

Send 1.5 mL plasma frozen in a screw-capped plastic vial. CRITICAL FROZEN.
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Minimum Volume

1.0 mL
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Transport Temperature

Critical frozen
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Rejection Criteria

Serum, non-frozen or hemolyzed specimens, EDTA plasma
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Stability

Room temperature: 4 hours
Refrigerated: Unacceptable
Frozen: 3 months
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Methodology

Platelet Agglutination
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Reference Range

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%
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Performing Laboratory

ARUP Reference Laboratory
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New York DOH Approval Status

Yes
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