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Prothrombin Time W/INR,Plasma
Test CodePT
Alias/See Also
Protime, PT, INR
CPT Codes
85610
Preferred Specimen
1.8 mL Buff. Na Citrate, 3.2% (blue top tube)
Minimum Volume
1 mL Plasma
Instructions
The tube must be filled to at least 90% of the proper level. Tube cannot be overfilled.
The coagulation tube (blue top) should be the second drawn tube following the RED top tube for chemistries. It should aslo be drawn before the EDTA or heparin tubes.
The coagulation tube (blue top) should be the second drawn tube following the RED top tube for chemistries. It should aslo be drawn before the EDTA or heparin tubes.
Specimen Stability
Blue Top:
Room temperature: 24 hours
Platelet-poor plasma:
Frozen (-20 C): 2 weeks
Room temperature: 24 hours
Platelet-poor plasma:
Frozen (-20 C): 2 weeks
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Overfilled or under filled tubes should be discarded and redrawn
Reference Range
"Test: PROTHROMBIN TIME
Male/Female All Ages:
Normal Range: 11.0-15.6 SECONDS
Test: INR
Male/Female All Ages:
Normal Range: 0.00-1.42 RATIO
Critical High : >=5.00 RATIO
"
Male/Female All Ages:
Normal Range: 11.0-15.6 SECONDS
Test: INR
Male/Female All Ages:
Normal Range: 0.00-1.42 RATIO
Critical High : >=5.00 RATIO
"
Performing Laboratory
Little Company of Mary Hospital
2800 W. 95th St.
Evergreen Park, IL 60805
