27085:RUSSELL VIPER VENOM TIME (RVVT) PHOSPHOLIPID NEUTRALIZATION
Photo-Optical Clot Detection
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 then 23 gauge. Fill tube to maximum draw, at least 90% full. Mix by gentle inversion.
Due to short stability, specimen must be either sent STAT to arrive at the laboratory within 4 hours, 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 using a plastic pipette, transfer the top 2/3 of the plasma into a plastic vial. Label with patient name, I.D. number, test, and “citrated plasma.” Freeze immediately. Send to PeaceHealth Laboratories within 7 days. If multiple tests are ordered, freeze a separate aliquot for this test.
4 hours refrigerated, or 7 days frozen.
4.5 mL whole blood or 2 mL plasma.
1.8 mL whole blood or 0.5 mL plasma.
Original tube refrigerated if sent STAT; citrated plasma frozen on dry ice in a Styrofoam container.