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HelpTest Code PT Prothrombin Time & INR
Performing Location
Specimen Collection Information
| Specimen | Min. Test Volume | Collection Container | Special Handling |
|---|---|---|---|
| Blood | To fill line | Light Blue (sodium citrate) | Invert gently 6-8 times to mix |
Reference Ranges & Critical Values
| Assay | Gender | Age Range | Normal Range | Critical Values | Units |
|---|---|---|---|---|---|
| PT | ALL | 0 Minutes – 150 Years | 8.8 - 12.5 | sec | |
| INR | ALL | 0 Minutes – 150 Years | 0.0 - 1.25 | ≥8.0 |
Specimen Stability
12 hours at room temperature.
- If testing is not completed within 4 hours, plasma can be frozen at -20°C or below for short term storage (up to 2 weeks) or -70°C or below for long term storage (12 months).
Day(s) Performed
Monday - Sunday
LOINC
34528-0
CPT
85610