PT is 14 seconds with INR 1.1. How would you classify this?

PT is 14 seconds with INR 1.1. How would you classify this?

• A. Normal PT/INR
• B. Prolonged PT
• C. Shortened PT
• D. Indeterminate

Answer: (A)

PT measures how long it takes blood to clot after adding tissue factor, and INR standardizes that result so labs can compare across methods. An INR of 1.1 sits within the normal reference range (roughly 0.9–1.1), indicating normal coagulation status. So, even if the raw PT value of 14 seconds varies by lab reference, the normal INR confirms there isn’t a clinically prolonged clotting tendency. A prolonged PT would show an INR above the normal range, while a shortened PT is unusual and would suggest faster-than-normal clotting. Indeterminate would apply if results were unclear or conflicting, which isn’t the case here.

PT measures how long it takes blood to clot after adding tissue factor, and INR standardizes that result so labs can compare across methods. An INR of 1.1 sits within the normal reference range (roughly 0.9–1.1), indicating normal coagulation status. So, even if the raw PT value of 14 seconds varies by lab reference, the normal INR confirms there isn’t a clinically prolonged clotting tendency. A prolonged PT would show an INR above the normal range, while a shortened PT is unusual and would suggest faster-than-normal clotting. Indeterminate would apply if results were unclear or conflicting, which isn’t the case here.