difference between protime and inr
What's the difference between pt and inr? In brief: Uniform standered. Pt is prothrombin time, inr is international normalized ratio, both measure cloting tendency in disease and in health. In pt each time you need contol which varies place to place and some what unpredictble. So inr solves the problem by uniform standred all over the world. Overview 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 disorders such as atrial fibrillation or a blood clot in the leg or lung. In certain situations, such as having a mechanical heart valve, you might need a slightly higher INR. Difference between INR and APTT INR and APTT are two types of test conducted to measure the coagulation of blood in the patient. INR stands for âInternational Normalized Ratioâ. It is also called âProTime INRâ and âINR PTâ. APTT, on the other hand, stands for âActivated Partial Thromboplastin Timeâ. The international normalized ratio is derived form the prothrombin time (PT) and the prothrombin ratio (PR). These are used to measure the extrinsic pathway of coagulation.