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Test Code AXA Heparin Anti-Xa Assay, Plasma

Methodology

Chromogenic Method on STA-R

Performing Laboratory

Huntsville Hospital Laboratory

Specimen Requirements

1. Draw blood in a blue-top (3.2% sodium citrate) tube(s).

2. Spin down, remove plasma, spin plasma again, and place 1 mL of citrate platelet-poor plasma into a plastic vial.

Note:  Double-centrifuged specimen is critical for accurate results as platelet contamination may cause spurious results.

3. Send specimen frozen.

Reference Values

Therapeutic range:  0.5-1.0 IU/mL

Day(s) Test Set Up

Monday through Sunday

CPT Coding

85520

Secondary ID

HHA1476

LOINC Coding

Test Name LOINC Code

Heparin Anti-Xa Assay, Plasma

3271-4

 

Specimen Stability Information

 

Specimen Type

Temperature

Time

Platelet poor plasma, citrated

Frozen

14 days

  Refrigerated 4 hours
  RT 4 hours

 

Reject Due To

 

Hemolysis

Mild:

ok

Gross:

Reject

Lipemia

Mild:

ok

Gross:

ok

Icterus

Mild:

ok

Gross:

ok