The normal INR range is which of the following?

The normal INR range is which of the following?

• A. 0.8-0.9
• B. 0.9-1.1
• C. 1.2-1.4
• D. 2.0-3.0

Answer: (B)

INR is a standardized measure of how quickly blood clots, adjusted so results are comparable across labs. The normal range represents the body’s baseline clotting tendency, essentially the reference value around which clotting time is expected to fall in someone not on anticoagulants. Values that are lower indicate quicker clotting, while higher values indicate slower clotting. The correct choice is the one that aligns with this normal, untreated state, not the ranges used for people on anticoagulation or for conditions that alter coagulation.

INR is a standardized measure of how quickly blood clots, adjusted so results are comparable across labs. The normal range represents the body’s baseline clotting tendency, essentially the reference value around which clotting time is expected to fall in someone not on anticoagulants. Values that are lower indicate quicker clotting, while higher values indicate slower clotting. The correct choice is the one that aligns with this normal, untreated state, not the ranges used for people on anticoagulation or for conditions that alter coagulation.