A prothrombin time (PT or PT/INR) test measures how quickly your blood clots. The results may be in seconds or, more commonly, a calculation called the International Normalized Ratio (INR).

Aug 21, 2025 · Decipher normal INR levels and target ranges. Understand how to monitor and maintain your blood clotting for better health.

Mar 16, 2023 · INR levels are a measure of how long it takes for a person's blood to clot. Understand your normal range and what high INR levels can mean for your health.

Jun 13, 2019 · Here is a brief simplified chart of human blood INR Range, showing INR levels, and the factors that affect them. This chart illustrates typical therapeutic INR levels, while …

2 days ago · Quick Interpretation Guide Normal Range: 10-13.5 seconds; INR of 0.8-1.1 (if not on anticoagulants) Slightly Elevated/Low: PT 13.5-16 seconds or INR 1.1-1.5 — may indicate …

Nov 21, 2025 · What is a normal INR level? Get clear guidance on standard and therapeutic blood clotting ranges, external factors, and risk management.

A normal PT-INR range for people who take warfarin is 2-3 but can vary from patient to patient. Patients who tend to clot more easily may have an INR target range of 3-4.

Jan 19, 2024 · PT/INR and PTT tests evaluate your blood's ability to clot properly to identify risks for bleeding disorders or excessive clotting. They can also help monitor the effectiveness of …

Learn about the International Normalized Ratio (INR) test, its role in blood clotting, normal INR ranges, and why INR monitoring is crucial for patients on blood thinners like warfarin.

Interpreting PT/INR results can be confusing. For patients with a history of valve replacement or AFIB, the goal is to maintain a therapeutic range of between 2.0 to 3. Excessive clotting or …