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HelpPT/INR*
Methodology
Photo-Optical
Includes International Normalized Ratio (INR).
Performing Laboratory
Rutland Regional Medical Center Laboratory
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 original tube. Stable 24 hours.
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)