Inr

Author:Prof. Dr. med. Peter Altmeyer

All authors of this article

Last updated on: 29.10.2020

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Synonym(s)

International Normalized Ratio

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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

Authors

Last updated on: 29.10.2020

Author: Prof. Dr. med. Peter Altmeyer