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HelpTest Code LAB316 Anti-Xa Level- Low Molecular Weight Heparin
Additional Codes:
LMWH – Low Mol Wght Hep
Notes:
Must specify/indicate LMWH on lab request. Anti-Xa levels cannot be performed in house for patients on Orgaran (Danapanoid), Fondaparinux, Apixaban, and Rivaroxaban and will be referred to a reference lab for testing
Collection:
Specimen: Blood
Container: Blue Top Tube with 3.2% (0.109 M) buffered Sodium Citrate anticoagulant only
Specimen Volume: 3.5 mL Must be filled to arrow (Greiner tube Black Disk) or line (BD)
Pediatric Collection: 2.0 mL Must be filled to arrow (Greiner tube White Disk) or line (BD)
Notes:
- Samples not filled properly will be rejected (over or under filled).
- If the patient's hematocrit is >55%, call Lab Client Services at 792-0707 to obtain an anticoagulant adjusted tube.
- For collection information and guidance refer to MUSC Laboratory Services Hemostasis / Coagulation Collection Guideline.
Stability:
Room Temperature: 2 hour Whole Blood
Refrigerated: 2 hour Whole Blood
Frozen at or below -20°C: 2 weeks
Turnaround Time (TAT):
STAT: 2 HOURS
Routine: 4 HOURS
Test Availability:
Daily / 24 Hours / Available STAT
Interpretive Data:
Low Molecular Weight Heparin:
Deep Vein Thrombosis (DVT) prophylaxis: 0.2 - 0.5 anti-Xa IU/mL
DVT / Pulmonary Embolus (PE) therapy: 0.6 - 1.0 anti Xa IU/mL
Performed In:
COAGULATION / UMC MAIN LABORATORY