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Prothrombin Time

Get accurate Prothrombin Time Test results. Monitor clotting and assess anticoagulant therapy. Essential for patient care. Learn more.

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By Joshua Napilay on Aug 2, 2025.

Fact Checked by Nate Lacson.

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Commonly asked questions

Healthcare professionals, including doctors, surgeons, hematologists, and primary care physicians, typically request Prothrombin Time Tests based on clinical indications.

Prothrombin Time Tests are used for various purposes, such as monitoring anticoagulant therapy, assessing clotting disorders, evaluating liver function, and before surgical procedures to determine a patient's risk of bleeding.

A blood sample is collected from a patient and mixed with a reagent called thromboplastin and calcium in a laboratory setting. The time it takes for the blood to clot is recorded, and the results are typically reported as an International Normalized Ratio (INR).

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