ARUP's Laboratory Test Directory
| 0030144: Heparin Anti-Xa, Low Molecular Weight Heparin |
| Test Mnemonic: HA LMW | |
|
Methodology: Chromogenic/Inhibition of Xa
Performed: Sun-Sat Reported: Within 24 hours |
| Specimen Required: | |
|
Collect: One 5 ml lt. blue (3.2 % sodium citrate). Refer to the Hemostasis/Thrombosis Specimens section in the front of this User's Guide for additional specimen collection instructions.
Transport: 2 mL platelet-poor plasma, frozen. (Min: 1.5 mL) Pediatric Collection/Transport: 1.5 mL platelet-poor plasma, frozen. Remarks: Record heparin type on test request form. Sample should be centrifuged within one hour of collection. Unacceptable Conditions: Serum, hemolyzed samples, EDTA, oxalate, heparin, PST tubes, and samples refrigerated more than eight hours. Stability: After separation from cells: Ambient: 4 hours; Refrigerated: 8 hours; Frozen: 2 weeks |
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| Reference Interval: |
| 0.50-1.10 U/mL |
| Interpretive Data: | |
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Therapeutic range based on enoxaparin brand low molecular weight heparin.
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| CPT Code(s): | |
| 85520 |