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Factor IX Activity
Test CodeFAC9
Alias/See Also
Epic: LAB308
Preferred Specimen
Specimen Type: Platelet-poor plasma
Collection Container: Light-blue top (3.2% sodium citrate)
Specimen Volume: 1 mL
Minimum Volume
0.5 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
Plasma
Room temperature: 4 hours
Refrigerated: Unacceptable
Frozen: 1 month
Whole Blood
Room temperature: 4 hours
Refrigerated: Unacceptable
Frozen: Unacceptable
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Unacceptable Specimens: Samples that are short draws, clotted or have excessive hemolysis, icterus or lipemia should not be used, as they may yield incorrect results.
Setup Schedule
Monday - Friday, AM
Report Available
1 day
Reference Range
81 - 160 %
Performing Laboratory
Inova Laboratories
2832 Juniper Street
Fairfax, VA 22031
Last Updated: April 10, 2023
Last Review: N. Wolford, April 10, 2023