Test Details
Mnemonic
HEPXA
Ordering Code
3424250
CPT-4 Code(s)
85520
Specimen Information
Collect
Light blue sodium citrate
Specimen Preparation
See appendices for coagulation test collection instructions. Send 2.0 mL plasma in a screw capped plastic vial.
Minimum Volume
1.0 mL
Transport Temperature
Frozen
Rejection Criteria
Hemolysis
Stability
Room temperature: Unacceptable
Refrigerated: Unacceptable
Frozen: 30 days
Refrigerated: Unacceptable
Frozen: 30 days
Methodology
Chromogenic
Reference Range
Reference range for peak anti-Xa levels measured
4 hours after dosing:
Enoxaparin (Lovenox)
Prophylaxis: 0.3-0.6 IU/mL
Therapeutic bid dosing: 0.6-1.0 IU/mL
Therapeutic qD dosing: >1.0 IU/mL
Tinzaparin (Innohep) Therapeutic qD: >0.85 IU/mL
Dalteparin (Fragmin) Therapeutic qD: >1.05 IU/mL
4 hours after dosing:
Enoxaparin (Lovenox)
Prophylaxis: 0.3-0.6 IU/mL
Therapeutic bid dosing: 0.6-1.0 IU/mL
Therapeutic qD dosing: >1.0 IU/mL
Tinzaparin (Innohep) Therapeutic qD: >0.85 IU/mL
Dalteparin (Fragmin) Therapeutic qD: >1.05 IU/mL
Performing Laboratory
QUEST
New York DOH Approval Status
Yes