What is INR and what is it used for?

INR (International Normalized Ratio) measures how long it takes blood to clot compared to normal. It is essential for controlling the dosage of anticoagulants such as warfarin.

Why is a coagulation panel ordered before surgery?

To ensure that the blood clots properly and reduce the risk of excessive bleeding during and after the surgical procedure.

What can cause abnormal coagulation results?

Anticoagulant medications, vitamin K deficiencies, liver diseases, hemophilia, and other inherited clotting disorders.

Coagulation

Coagulation Panel

The coagulation panel evaluates the blood's ability to form clots properly by measuring prothrombin time (PT), INR, and activated partial thromboplastin time (aPTT). It is essential before surgeries, for monitoring anticoagulant therapy, and for diagnosing bleeding disorders.

Preparation

Fasting is not required. Inform your doctor about all anticoagulants or supplements you are taking, as they can significantly affect results.

Included Tests

LOINC	Test	Unit	Range
5902-2	Prothrombin Time (PT)	s	11 – 13.5
6301-6	International Normalized Ratio (INR)	{INR}	0.8 – 1.1
3173-2	Activated Partial Thromboplastin Time (APTT)	s	25 – 35

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Frequently Asked Questions

Other Guides

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