Ordering Recommendation

Monitor treatment efficacy of unfractionated heparin.

Mnemonic
HA UN
Methodology

Chromogenic Assay

Performed

Sun-Sat

Reported

Within 24 hours

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. Specimens refrigerated more than eight hours. Hemolyzed specimens.

Remarks

Record heparin type on test request form.  This test cannot be used for Rivaroxaban (Xarelto).

Stability

After separation from cells: Ambient: 4 hours; Refrigerated: 8 hours; Frozen: 1 month

Reference Interval

0.35-0.70 U/mL

Interpretive Data



No compliance statements are in use for this test.

Note
Hotline History
N/A
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