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PTT
Test CodePTT
Preferred Specimen
Blood
Minimum Volume
Tube must be filled to within 10% of container volume.
Instructions
3.2% Sodium Citrate light blue tube filled to within 10% of container volume. Samples drawn using a winged collection set (butterfly) must use a discard tube prior to filling the blue top tube. Air must be removed from the tubing to insure the proper blood volume is obtained in the blue top tube.
Transport Temperature
Room Temperature
Centrifuge within 1 hour of collection.
Centrifuge within 1 hour of collection.
Specimen Stability
Testing must be completed within 4 hours of collection.
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Samples that have been refrigerated.
Samples with combined contents from separate, underfilled sodium citrate collection tubes
Samples with combined contents from separate, underfilled sodium citrate collection tubes