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MIXING STUDY PT/PTT
MessageIf the specimen is not immediately sent to the Piedmont Lab within an hour of collection, spin and freeze platelet free plasma. Note citrated plasma on the pour off tube. See instructions below.
Test Code
MIXSY
Alias/See Also
LAB2133 MIXING STUDY SCREEN 82235
Preferred Specimen
Draw 4 blue top tubes. VENOUS BLOOD DRAW IS REQUIRED.
Minimum Volume
Full tube, no partial fills.
Instructions
Centrifuge light blue-top tube 15 minutes at approx. 1500 x g within 60 minutes of collection. Using a plastic pipette, remove plasma, taking care to avoid the WBC/platelet buffy layer and place into a plastic vial. Centrifuge a second time and transfer platelet-poor plasma into a new plastic vial. Plasma must be free of platelets (< 10,000/mcL). Freeze immediately and sent frozen to Piedmont Lab.
Transport Container
SEND TO PIEDMONT ON DRY ICE.
Specimen Stability
4 hours room temperature or 2 weeks frozen plasma (-20 C)
Performed By
Piedmont Atlanta
