This is a test derived from another, the prothrombin ratio. It measures the extrinsic clotting pathway system, commonly used to measure warfarin (blood thinning) drugs. A normal, healthy person will have an INR of 1. In warfarin therapy, an INR is usually aimed for around 2.
INR is the international normalized value for prothrombin time. It is a value that measures the extrinsic pathway of clotting, and is often used to determine how quickly the person will make clots. It is often used to determine if the patient is on therapeutic doses of blood thinners.
The INR has basically replaced the prothrombin time, or PT.
The prothrombin test specifically evaluates the presence of factors VIIa, V, and X, prothrombin, and fibrinogen.
light blue
A light blue-top tube containing sodium citrate is typically used for a prothrombin time (PT) test, which is used to assess blood clotting function.
The test is also known as the pro time or PT test.
Prothrombin time
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Prothrombin time
The prothrombin time test is used to measure how long it takes for blood to clot. It is primarily used to monitor the effectiveness of anticoagulant medications, assess a person's risk of excessive bleeding, and diagnose bleeding disorders or liver disease.
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Prothrombin time
Prothrombin time is a blood test used to evaluate the clotting ability of the blood. It measures how long it takes for blood to clot, which can help diagnose bleeding disorders or monitor the effectiveness of blood-thinning medications.