Test Details

Mnemonic

WHEXP

Ordering Code

2500830

CPT-4 Code(s)

85598

Specimen Information

Patient Preparation

Patient should not be on Warfarin (Coumadin®) therapy for 2 weeks or heparin therapy for 2 days before testing. Please note if patient is on either therapy as these therapies can affect certain coagulation factors or assays, preclude their performance or cause spurious results.

Collect

Light blue 3.2 % sodium citrate

Specimen Preparation

Send 3.0 mL plasma in a screw capped plastic vial. CRITICAL FROZEN.

Minimum Volume

2.0 mL

Transport Temperature

CRITICAL FROZEN

Rejection Criteria

Hemolyzed specimen, thawed specimen, serum

Stability

Room temperature: 8 hours
Refrigerated: Unacceptable
Frozen: 30 days

Methodology

Clotting
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Reference Range

Negative
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Performing Laboratory

Warde Medical Laboratory
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New York DOH Approval Status

Yes
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