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HelpTest Code LAB316 HEPARIN LEVEL, LOW MOLECULAR WEIGHT (LMWH)
Method
Chromogenic Anti Xa Assay
CPT(s)
| Description | CPT Code |
| Heparin Level Low Molecular Weight | 85520 |
Specimen Information
| Container | Specimen | Temperature | Collect Vol | Submit Vol | Min Vol | Stability |
| Blue Top Tube | Plasma | Frozen | To fill line | 1 mL plasma | 1 mL plasma | 6 months |
| Blue Top Tube | Whole Blood | Ambient | To fill line | To fill line | To fill line | 75 minutes |
TUBE MUST BE FULL AT COLLECTION. Whole blood should remain at ambient temperature until processed. Refer to Coagulation Specimen Handling prior to collection. Double spin before freezing-see Coag Spec Processing step 3. Submit 2 × 0.5 mL frozen plasma aliquots for this test. Draw blood in light blue top tube(s). Spin down, remove plasma, spin plasma again and place citrate platelet-poor plasma in the required number of plastic vials (Glass vials cannot be accepted.) Freeze specimen at ≤ -40° C if possible. Send specimen frozen on dry ice. Each coagulation assay requested should have one tube per test.
Reference Range
THERAPEUTIC HEPARIN RANGE
(for twice-a-day dosing, peak sample drawn 4 hours post subcutaneous injection) for treatment of venous thromboembolism: Adults and children: 0.5 – 1.1 IU/mL Newborn: 0.5 - 1.0 IU/mL
(for once-a-day dosing, peak sample drawn 4 hours post subcutaneous injection) for treatment of venous thromboembolism: 1.0 – 2.0 IU/mL Patient sample tested against Low Molecular Weight heparin – Results may not be reliable for unfractionated heparin, pentassacharide (Fondaparinux) or Danaparoid (ORGARAN).
Instrumentation
ACL Top
Performing Location
University of Vermont Medical Center
Test Schedule / Analytical Time / Test Priority
Daily / 24 Hours / Available STAT
Section
Coagulation
Is the UVMMC lab NY State Certified to perform this testing? Yes/No
Yes