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INR Testing (INR)

The INR test is also known as a International normalised ratio test.

All you need to know about testing INR levels with a laboratory test

  • What is the INR test for?
  • What if INR results are high?
  • What if INR results are low?

What Is The INR Test For?

INR measures how long blood takes to clot and is used to monitor warfarin.

Conditions linked to INR

Blood clots

Blood clots

Blood clots can form in the veins or arteries and, if left untreated, may lead to serious complications including deep vein thrombosis and pulmonary embolism.

How To Test INR

By buying a laboratory test kit with professional nurse or clinic collection, you can accurately measure INR for total reassurance.

Professional analysis in an accredited laboratory ensures rapid result delivery.

Tests which include a INR test:

What if INR Results Are High?

High INR means the blood is taking longer than usual to clot and is associated with an increased risk of bleeding.

This result is generally treated as clinically significant and is often prioritised for early review to clarify the cause and consider contributing factors, including blood-thinning medicines and reduced production of clotting factors.

What if INR Results Are Low?

Low INR means the blood is clotting faster than the reference range suggests (a shorter clotting time).

Why Take The INR Test?

This test is essential for monitoring warfarin therapy and assessing bleeding risk. It is also used in liver disease assessment and clotting investigations.

Who Should Take This Test?

Measure your INR levels and with a nurse or clinic test kit

You get the convenient testing with the reassurance of professional clinical analysis. Your results are delivered quickly & securely online.

This Test is advised if you:

  • want the convenience of home testing without waiting for a GP appointment;
  • need a high quality, clinically accredited test done in a professional clinical laboratory.
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