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International Normalized Ratio (cannot be ordered without Prothrombin Time)
MessageReference intervals established using 3.2% sodium citrate.
Test Code
801
Alias/See Also
Protime, PT/INR; INR; PT/International Normalized Ratio
Preferred Specimen
Lt. blue (sodium citrate). Completely full
Minimum Volume
Transport to lab within 30 minutes or freeze plasma and transport frozen.
Instructions
Mix thoroughly. If there is more than a 30 minute transport time transfer 1 mL platelet-poor plasma to a Transport Tube. (Min: 0.5 mL)
Transport Temperature
Transport to lab within 30 minutes or freeze plasma and 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 completely full.
Methodology
Optical Clot Detection
Setup Schedule
Sun-Sat
Report Available
Within 24 hours