Heparin Xa, Unfractionated Heparin
24 hours
Chromogenic
Accredited NRL Laboratory
Daily
UFH Xa is used to assess specific biochemical, hematological, or immunological parameters for diagnosis or monitoring of related conditions.
Plasma
0.5 mL
3.2% sodium citrate blue top
No special preparation is required for this test. You may eat, drink, and take your medications as normal, unless instructed otherwise by your healthcare provider.
Blood should be collected in a blue-top tube containing 3.2% buffered sodium citrate.1 Evacuated collection tubes must be filled to completion to ensure a proper blood to anticoagulant ratio.2,3 The sample should be mixed immediately by gentle inversion at least six times to ensure adequate mixing of the anticoagulant with the blood. Centrifuge and carefully remove the plasma using a plastic transfer pipette, being careful not to disturb the cells. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
| Temperature | Period |
|---|---|
| Frozen | 24-48 hours |