Test Details
Mnemonic
WHEXP
Ordering Code
2500830
CPT-4 Code(s)
85598
Specimen Information
Patient Preparation
Patient should not be receiving anticoagulant treatment (eg, warffarin, heparin).
Collect
Light blue 3.2 % sodium citrate
Specimen Preparation
For complete instructions, see Coagulation Test Collection Guide found under Resources/Interpretation Guides and Forms. Send 3.0 mL platelet-poor plasma in a screw capped plastic vial. CRITICAL FROZEN.
Minimum Volume
2.0 mL
Transport Temperature
CRITICAL FROZEN
Rejection Criteria
Refrigerated, thawed, refrozen specimens, serum
Stability
Room temperature: 4 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