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Prothrombin Time (includes INR)
MessageReference intervals established using 3.2% sodium citrate.
Test Code
800
Alias/See Also
Prothrombin Time, Plasma; PT
Preferred Specimen
Lt. blue (sodium citrate) tube completely filled. Mix thoroughly
Minimum Volume
Transport to the lab within 30 minutes or transport frozen.
Instructions
Mix thoroughly. (Min: 0.5 mL plasma) Tube needs to be full or sample will be rejected.
Transport Temperature
Transport to the lab within 30 minutes or transport frozen.
Specimen Stability
Separated Plasma: Ambient: 24 hours; Refrigerated: 24 hours; Frozen: 1 week
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Serum, clotted, or hemolyzed specimens. Tube not full.
Methodology
Optical Clot Detection
Setup Schedule
Sun-Sat
Report Available
Within 24 hours
