Prothrombin Time (PT/INR) Test - Cleveland Clinic
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).
What Is a Normal INR Level and Its Target Ranges?
Aug 21, 2025 · Decipher normal INR levels and target ranges. Understand how to monitor and maintain your blood clotting for better health.
Prothrombin time test - Mayo Clinic
Dec 3, 2024 · In people without health conditions, an INR of 1.1 or below is considered typical. An INR range of 2.0 to 3.0 is generally an effective therapeutic range for people taking warfarin for certain …
Understanding Your INR Blood Test Results: What Do They Mean?
Jun 11, 2025 · Interpreting your INR blood test results requires an understanding of the normal range and what the values mean. Here's a breakdown of the possible INR ranges and their implications:
Elevated INR: Causes, Signs, Treatment, Prevention
Dec 9, 2025 · What is an elevated INR? The INR, or International Normalized Ratio, is a measure of how long it takes your blood to clot. A prothrombin time (PT) is a another blood test done to help …
Your Guide to INR Levels: What It Means, Why It’s Important
When you have a blood clot, which doctors call a thrombus, doctors measure PT using the INR. The INR number tells them how much time it takes for your blood to clot.
Understanding INR Levels and Prothrombin Time Tests - GoodRx
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.
Understanding the INR Blood Test and Results - lincare.com
Nov 4, 2025 · The INR (International Normalized Ratio) test helps monitor how quickly your blood clots. For patients taking blood thinners, this test helps to ensure medication is working effectively within …
Prothrombin Time Test and INR (PT/INR) - MedlinePlus
To understand the results of a PT/INR test, your provider will consider your symptoms, medical history, and the results of other blood tests. Learn more about laboratory tests, reference ranges, and …
Health Encyclopedia - University of Rochester Medical Center
The INR is a ratio, so it's just a number, not a number tied to time or another value. Your results will vary according to your age, the medicines you take, and any health problems you have.