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Caring for Life

Prothrombin Time Test and INR (PT/INR): MedlinePlus Medical Test

What happens throughout a PT/INR check?

The check could be completed on a blood sample from a vein or a fingertip.

For a blood sample from a vein:

A health care expert will take a blood sample from a vein in your arm, making use of a small needle. Immediately after the needle is inserted, a small amount of blood will be collected into a check tube or vial. You could experience a minor sting when the needle goes in or out. This typically takes much less than 5 minutes.

For a blood sample from a fingertip:

A fingertip check could be completed in a provider’s business or in your home. If you are taking warfarin, your company could suggest you check your blood often making use of an at-home PT/INR check kit. Throughout this check, you or your company will:

  • Use a small needle to puncture your fingertip
  • Collect a fall of blood and area it onto a check strip or other distinctive instrument
  • Place the instrument or check strip into a system that calculates the effects. At-home units are small and light-weight.

If you are making use of an at-home check kit, you will require to assessment your effects with your company. Your company will let you know how he or she would like to get the effects.