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HelpPT/INR*
Specimen Requirements
Specimen Type: Whole blood
Container/Tube: Light-blue top (citrate)
Specimen Volume: Full tube
Specimen Minimum Volume: 2.7 mL
Collection Instructions:
1. Tube must be full. (Do not underfill or overfill tube.)
2. Send specimen Room Temperature in the original tube. Stable 24 hours.
Methodology
Photo-Optical
Includes International Normalized Ratio (INR).
Performing Laboratory
Rutland Regional Medical Center Laboratory
Specimen Transport Temperature
Room Temperature 24 hours
Normal Reference Values
PT
9.2-10.6 seconds
INR
No anticoagulant therapy: 0.8-1.2
Therapeutic: 2-3
Day(s) Performed
Daily
Analytical Time:
1 day
Available Stat
Test Classification and CPT Coding
85610
Critical Values
PT
>25 seconds (automatic call-back)
INR
No anticoagulant therapy: >4 (automatic call-back)
Therapeutic: >5 (automatic call-back)