General Information About the Test
Test Process and Preparation
INR is a mathematical ratio that allows test results from different laboratories to be standardized (brought to a common language) anywhere in the world. In patients using Coumadin (Warfarin), the target INR is generally maintained between 2.0 and 3.0.
A very high PT/INR value indicates that the blood is too thin and the patient's risk of internal bleeding or a brain hemorrhage has increased. Conversely, a very low value indicates that the blood is not thin enough and the danger of forming blood clots in the vessels continues.
There is no fasting requirement when giving a blood sample. However, it is very important for patients to consistently consume foods that affect blood clotting (especially dark green leafy vegetables containing Vitamin K) in steady amounts in their daily diets, rather than avoiding them just for the test.
The information on this page is for informational purposes only. The results of medical tests must be evaluated by specialist physicians.
