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

Allan I. Fleming

What comes about for the duration of a PT/INR examination?

The examination may be done on a blood sample from a vein or a fingertip.

For a blood sample from a vein:

A wellbeing care experienced will get a blood sample from a vein in your arm, making use of a modest needle. Immediately after the needle is inserted, a modest volume of blood will be gathered into a examination tube or vial. You may come to feel a tiny sting when the needle goes in or out. This ordinarily requires considerably less than five minutes.

For a blood sample from a fingertip:

A fingertip examination may be done in a provider’s office or in your dwelling. If you are taking warfarin, your supplier may endorse you examination your blood on a regular basis making use of an at-dwelling PT/INR examination package. Throughout this examination, you or your supplier will:

  • Use a modest needle to puncture your fingertip
  • Accumulate a fall of blood and place it on to a examination strip or other unique instrument
  • Put the instrument or examination strip into a device that calculates the results. At-dwelling units are modest and lightweight.

If you are making use of an at-dwelling examination package, you will have to have to evaluation your results with your supplier. Your supplier will permit you know how he or she would like to acquire the results.

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