All tests · Coagulation Studies
Coagulation Studies
Normal range 0.8–1.1 (off anticoagulation) ratio (0.8–1.1 ratio SI). Specimen: Plasma (sodium citrate).
Also known as: INR.
| Specimen | Plasma (sodium citrate) |
|---|---|
| Conventional range | 0.8–1.1 (off anticoagulation) ratio |
| SI range | 0.8–1.1 ratio |
| Conversion factor | ×1 (conventional → SI) |
| Critical value | > 5.0 (high spontaneous bleeding risk) |
| Panel | Coagulation Studies |
Convert any International Normalized Ratio (INR) result between units on the unit converter.
The standard teaching reference range for International Normalized Ratio (INR) is 0.8–1.1 (off anticoagulation) ratio in conventional units, or 0.8–1.1 ratio in SI units. This value is measured in plasma (sodium citrate).
A commonly taught critical (panic) value is > 5.0 (high spontaneous bleeding risk). Critical results are reported to the provider immediately under your facility's policy.
Source: Adult reference values compiled from Pagana & Pagana, Mosby's Diagnostic and Laboratory Test Reference, and Fischbach & Dunning, A Manual of Laboratory and Diagnostic Tests. Reference ranges vary by laboratory, method, age, sex, and population — always use the range printed on the actual result.
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