Synonym(s)
International Normalized Ratio
DefinitionThis section has been translated automatically.
Acronym for "International Normalized Ratio". The INR is the recommended unit for determining blood coagulation. It is inversely proportional to the Quick-value. Standard value INR = 1.0 (therapeutic INR values are between 2.0-4.0). The measurement of the INR is particularly necessary for oral anticoagulation with coumarins.
Note(s)This section has been translated automatically.
With decreasing quick-value the INR increases. The clotting time is longer and the bleeding tendency increases. As the Quick-value increases, the INR becomes smaller: the clotting time is shorter and the risk of thrombosis increases.
TablesThis section has been translated automatically.
INR* |
Quick value |
1,5-2,5 |
50-30% |
2,0-3,0 |
35-25% |
3,0-4,5 |
25-15 |
Prof. Dr. med. Peter Altmeyer