PT-INR Test

Description

PT-INR Test
The PT-INR (Prothrombin Time – International Normalized Ratio) Test measures how long it takes your blood to clot. It helps evaluate blood clotting function and is commonly used to monitor patients on blood-thinning medications like warfarin, as well as to assess bleeding disorders or liver function.

Why This Test is Done:

• Monitor anticoagulant therapy (warfarin)

• Detect clotting disorders or excessive bleeding tendencies

• Assess liver function and vitamin K status

• Pre-surgical evaluation of clotting ability

How It Works:
A blood sample is tested to measure prothrombin time (PT) and converted to INR for standardized results, ensuring accurate monitoring across different labs.

Sample Requirement: Blood sample
Reporting Time: Same day

Certain medications and foods can affect PT-INR results—follow your doctor’s instructions before the test.