Heparin Anti-Xa, Unfractionated

0030143
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Example Reports
High
Normal

Ordering Recommendation

Monitor treatment efficacy of unfractionated heparin.

Mnemonic

HA UN

Methodology

Chromogenic Assay

Performed

Sun-Sat

Reported

1-2 days

New York DOH Approval Status

This test is New York DOH approved.

Specimen Required

Patient Preparation
Collect

Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.

Specimen Preparation

Centrifuge specimen within one hour of collection. Transport 2 mL platelet-poor plasma. (Min: 1 mL)

Storage/Transport Temperature

Frozen.

Unacceptable Conditions

Serum. EDTA, oxalate, heparin, or plasma separator tubes. Hemolyzed or clotted specimens.

Remarks

This test cannot be used to quantitate anticoagulants other than unfractionated heparin. This includes, but is not limited to, direct oral anticoagulants and Fondaparinux (Arixtra).

Stability

After separation from cells: Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 1 month
University of Utah Clients: After separation from cells: Ambient: 4 hours; Refrigerated: 8 hours; Frozen: 2 weeks

Reference Interval

0.35-0.70 U/mL

Interpretive Data



Compliance Category

FDA

Note

Hotline History

View Hotline History

 

Hotline History

Date of Change
Test Name Change
Methodology
Performance/Reported Schedule
Specimen Requirements
Reference Interval
Interpretive Data
Note
CPT Code
Component Change
Other Interface Change
New Test
Inactive
05/17/2021
X
X
N/A

CPT Codes

85520

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Components

Component Test Code* Component Chart Name LOINC
0030143 Heparin Anti-Xa Unfractionated 3274-8
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • Anti-10a
  • Anti-Xa
  • Heparin Anti-Xa Assay
  • Heparin Anti-Xa Assay, Plasma
  • Unfractionated Heparin Assay
Heparin Anti-Xa, Unfractionated