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
Refrigerated: Unacceptable
Frozen: 30 days
Methodology
Clotting
Reference Range
Negative
Performing Laboratory
Warde Medical Laboratory
New York DOH Approval Status
Yes