What does "PT/INR" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.
PT/INR is a blood test used in medicine to check how long it takes for a person's blood to clot. PT stands for Prothrombin Time, which measures the time it takes for the blood to start clotting. INR, or International Normalized Ratio, is a standard way doctors use to compare test results from different labs. This test is often used for people taking blood-thinning medications to make sure the dosage is correct.
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