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Test Code LAB317 HEPARIN LEVEL-UFH

Important Note

UNFRACTIONATED HEPARIN 

Method

Chromogenic Anti Xa Assay

CPT(s)

Description CPT Code
Heparin Level Anti-XA 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 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:
Unfractionated heparin therapeutic range 0.3 – 0.7 IU/mL. Results may not be reliable for direct thrombin inhibitors or pentasaccharides such as fondaparinux.

Instrumentation

ACL Top 

Performing Location

University of Vermont Medical Center

UVMHN-Porter Medical Center Note:

PERFORMED AT PORTER HOSPITAL LABORATORY

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