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Heparin Unfractionated Anti-Xa
Test CodeHEPUN
Alias/See Also
Epic: LAB2319
Unfractionated Heparin (UFH)
Low Molecular Weight Heparin (LMWH)
Unfractionated Heparin (UFH)
Low Molecular Weight Heparin (LMWH)
Preferred Specimen
Specimen Type: Platelet-poor plasma
Collection Container: Light blue top (citrate)
Specimen Volume: 1 mL
Minimum Volume
1 mL
Instructions
- Draw blood into a light blue (sodium citrate) tube. Be sure to fill tubes completely.
- Mix gently 5 to 6 times (do not over mix).
- Centrifuge the sample for 10 minutes.
- Using a pipette, aliquot plasma into a plastic vial being careful not disturb the buffy coat.
- Centrifuge the plasma sample a second time for 10 minutes
- Using a pipette, aliquot the top portion of plasma into a plastic vial. Be careful not to disturb the sediment at the bottom (leave approx. 0.25 mL of plasma at the bottom).
- Label each tube as "Plasma."
- Immediately freeze samples
Transport Container
Plastic vial
Specimen Stability
Platelet-poor plasma
Room temperature: 2 hours
Refrigerated: Unacceptable
Frozen (<-20°C): 2 weeks
Setup Schedule
Monday - Friday
Report Available
1 day
Reference Range
See laboratory report
Performing Laboratory
Inova Laboratories
2832 Juniper Street
Fairfax, VA 22031
Last Updated: May 9, 2023
Last Review: N. Wolford, May 9, 2023