Measurement of fibrinolytic activity of precipitated plasma “euglobulin” fraction
Specimen Collection Details
One 4.5 mL light blue top tube (sodium citrate). Collect by careful venipuncture to avoid tissue fluid contamination or hemolysis. Do not use needles smaller than 23 gauge. Fill tube to the maximum draw, at least 90% full. Mix by gentle inversion.
Due to short stability, specimen must either be sent STAT to arrive at the laboratory within 30 minutes, or sent frozen. For STAT, refrigerate and keep capped in original tube. Call for STAT pick-up. For standard delivery, centrifuge to produce platelet poor plasma (at least 1700 X G for 15 minutes) and with a plastic pipette, transfer plasma to a plastic vial. Freeze immediately. Label with patient name, I.D. number, test, and “citrated plasma.” Send to the laboratory within 7 days. If multiple tests are ordered, freeze a separate aliquot for this test.
30 minutes ambient or refrigerated, or 7 days frozen
4.5 mL whole blood or 2 mL plasma.
1.8 mL whole blood or 1 mL plasma.
Whole blood refrigerated; citrated plasma frozen on dry ice.
Screen for increased fibrinolytic activity in the plasma.
Visible fibrin; any emolysis; specimen received in laboratory beyond stated stability.