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

What happens in the course of a PT/INR check?

The check may possibly be performed on a blood sample from a vein or a fingertip.

For a blood sample from a vein:

A health and fitness treatment professional will consider a blood sample from a vein in your arm, making use of a modest needle. Just after the needle is inserted, a modest total of blood will be gathered into a check tube or vial. You may possibly feel a little sting when the needle goes in or out. This ordinarily can take a lot less than five minutes.

For a blood sample from a fingertip:

A fingertip check may possibly be performed in a provider’s place of work or in your home. If you are taking warfarin, your provider may possibly advise you check your blood regularly making use of an at-home PT/INR check package. In the course of this check, you or your provider will:

  • Use a modest needle to puncture your fingertip
  • Obtain a fall of blood and put it onto a check strip or other unique instrument
  • Location the instrument or check strip into a machine that calculates the outcomes. At-home gadgets are modest and light-weight.

If you are making use of an at-home check package, you will want to review your outcomes with your provider. Your provider will permit you know how he or she would like to get the outcomes.