Plasminogen activator inhibitor-1, activity-994

Test info

Plasminogen activator inhibitor-1, activity
PAI-1 activity


Sodium citrate (Na cit) plasma
1.0 mL
0.5 mL
  • NaCitrate tubes must be filled to provide proper blood to anticoagulant ratio.
  • If the patient's hematocrit exceeds 55%, the volume of citrate in the collection tube must be adjusted.
    • Adjustment Information:

High Hematocrit Samples. Patients with elevated hematocrits have a relatively low amount of plasma for a given whole blood (collection) volume. This tends to increase the plasma citrate concentration effectively. If the patient has a known hematocrit >55%, the amount of citrate in the collection tube must be decreased according to the formula below. The equation in CLSI H21 is as follows: C = (1.85 x 10−3) (100−Hct) (Vblood) Where: C is the volume of citrate remaining in the tube. Hct is the patient's hematocrit. V is the volume of blood added to the evacuated tube.

  • Example:

Patient hematocrit = 60% Total volume = 5 mL (standard citrated plasma collection tube volume) C = (0.00185) x (100-60) x 4.5 C = (0.00185) x 180 (or 40 x 4.5) C = 0.333

  • Immediately following collection, mix sample thoroughly by gently inverting 8 - 10 times to prevent clotting
  1. Spin
  2. Taking care not to disturb the cells, transfer plasma to a Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp) , labelled as Na cit plasma
  3. Freeze immediately

Frozen (strict) - 11 days

Ambient - NO

Refrigerated - NO


Viracor Eurofins via LabCorp (146787): R-NX

Enzyme-linked Immunosorbent Assay (ELISA)

Clinical and Interpretive info


0 - 27 IU/mL