Calculate International Normalized Ratio (INR) values quickly and accurately for anticoagulation therapy monitoring
The International Normalized Ratio (INR) is a standardized number that's calculated in the laboratory to monitor patients on anticoagulant therapy.
Formula: INR = (Patient PT / Control PT)ISI
0.8 - 1.2
Indicates normal blood clotting function. No anticoagulant effect present.
2.0 - 3.0 (most cases)
Target range for patients on warfarin therapy. Provides balance between clotting prevention and bleeding risk.
Above 3.5
Increased risk of bleeding. May require dose adjustment or vitamin K administration.
Above 5.0
Significant bleeding risk. Requires immediate medical attention and intervention.