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Test Code LAB317 Heparin Anti-Xa

Important Note

This test is used to monitor Un-Fractionated Heparin (UFH) therapy.  This test should not be ordered in place of an activated partial thromboplastin time (APTT).

Blue tubes that are not filled to the required line will not be processed, due to result integrity being affected.  

Useful For

Monitoring Un-Fractionated Heparin (UFH) therapy

Methodology

Competitive assay

Performing Laboratory

Bozeman Health Laboratory Services

Specimen Requirements

Specimen must arrive within 1 hour of draw.
 

Specimen Type: Whole blood
Container/Tube: Blue top (3.2% sodium citrate)

Specimen Volume: Full tube

Collection Instructions: 

1. Immediately after draw, invert tubes several times to mix blood with additive.

2. Send specimen in original tube.  Centrifuge within 1 hour.  Analyze within 2 hours.

Specimen Transport Temperature

Ambient

Specimen Stability

Specmen Type Temperature Time
Whole Blood (unspun) Ambient 1 hour
Whole Blood (spun) Ambient 2 hours

Reference Values

Reference (normal) Range: 0.0 - 0.1 U/mL

Therapeutic Range: 0.3 - 0.7 U/mL

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

85520