ARUP's Laboratory Test Directory
| 0030143: Heparin Anti-Xa, Unfractionated |
| Test Mnemonic: HA UN | |
|
Methodology: Chromogenic Assay/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 specimen collection instructions.
Transport: 2 mL platelet-poor plasma, frozen. (Min: 1.0 mL) Pediatric Collection/Transport: 1 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: 1 month |
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| Reference Interval: |
| 0.35-0.70 U/mL |
| CPT Code(s): | |
| 85520 |