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Test Code LAB316 Heparin Anti-Xa (Low Molecular Weight/ Unfractionated Heparin)

Department

HEMATOLOGY

Collection Requirements

Venipuncture only, do not draw from line.

Must be a full draw.

Mix thoroughly immediately after collection.

Primary Collection Container

Blue 2.7 mL (Citrate)

Transport

Platelet-poor plasma frozen

Preferred Transport Temperature

Frozen

Processing

Remote draws must be centrifuged at 3000 rpm for 15 min, separated, filtered, and fast frozen within 15 min. of collection.

Specimen cannot thaw before testing.

Pour off into two plactic tubes.

Stability

Ambient: 1 hour

Refrigerated: 2 hours

Frozen: 2 weeks

Minimum Testing Volume

2.7 mL

Reference Range

Low Molecular Weight Heparin

Prophylaxis: 0.20-0.50 UI/ml

Twice Daily dosing: 0.50-1.00 UL/ml

High Single dose daily: 1.0-2.0 IU/ml

Unfractionanted Heparin

Therapeutic Range: 0.3-0.7 IU/ml

Critical ≥1.0

Methodology

Chromogenic Xa, Kinetic Paranitroaliline Release ACL Top

Performed

Sunday-Saturday

Reported

As completed

CPT Codes

85520

Unacceptable Conditions

Hemolyzed, clotted, sort draw, non-frozen and serum specimens.

Additional Information

For use on patients receiving low molecular weight heparin or Unfractionated Heparin.