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In healthy people an INR of 1.1 or below is considered normal. An INR range of 2.0 to 3.0 is generally an effective therapeutic range for people taking warfarin for certain disorders. These disorders include atrial fibrillation or a blood clot in the leg or lung.
The normal ranges for PT/INR results are: 11 to 13.5 seconds. INR of 0.8 to 1.1. INR of 2.0 to 3.0 if you’re taking warfarin. (There are some conditions for which a higher or lower target PT range is desired.) Abnormal PT results. A high PT test result or INR level means it takes more time than usual for your blood to clot.
Normal and Critical Findings. For normal patients who are not on anticoagulation, the INR is usually 1.0 regardless of the ISI or the particular performing laboratory. For patients who are on anticoagulant therapy, the therapeutic INR ranges between 2.0 to 3.0. INR levels above 4.9 are considered critical values and increase the risk of bleeding.
The international normalized ratio (INR) test ensures that PT results are standardized. The PTT is mainly used to monitor a person’s response to the anticoagulant heparin and can also identify diseases that interfere with blood clotting.
An international normalized ratio (INR) is a blood test that indicates how well the blood is able to clot. People who take warfarin (Coumadin) need to monitor this level to make sure it doesn’t go too high or too low. A normal INR range is 0.8 to 1.1 if you’re not taking anticoagulant medications.
A typical INR target ranges from 2-3 but can vary from person to person. HOW OFTEN DO I NEED TO GET AN INR TEST? The American Heart Association (AHA) recommends that people taking warfarin should be tested at least once a month .
INR is a standardized measure of PT, ensuring consistency in results across different laboratories. The normal range for INR is around 0.8 to 1.2. Higher INR values suggest a slower clotting time and an increased risk of bleeding.