What's my PRA? It's the first question you should ask when pursuing a Kidney Transplant

When it comes to needing a kidney transplant most people are thinking about finding a compatible donor. They don’t realize that there is a test you need to take that will determine how easy or difficult it will be to find that person. The test is called PRA.

PRA’s are "panel reactive antibodies.” A blood test measures the level of antibodies in your blood. The more antibiodies you have, the more difficult it will be to find a compatible donor. A person's PRA can be anywhere from 0% to 99%. Your PRA represents the percent of the U.S. population that the antibodies in your blood would react negatively to. For example, having a PRA of 25 means that about 25% of the population will not be able to donate a kidney to you. The antibodies present in your blood would attack the transplanted kidney and can cause immediate rejection. About 20% of the people who need a kidney transplant have high PRA’s. Simply stated, having a high PRA will significantly limit the number of people that will be able to donate to you.

You can develop high PRA’s from a blood transfusion, or an earlier transplant or from being pregnant.

There are ways of lowering PRA’s through a procedure called Plasmapheresis a blood-cleansing process that can eliminate the dangerous antibodies from the blood. Plasmapheresis is used only in cases in which the patient has a live donor.

Plasmapheresis can also been used to allow blood-type incompatible donor/recipients to proceed with the transplant. Plasmapheresis can cost tens of thousands of dollars more than conventional transplants and are complex to administer.

If you’ve been told by a transplant center that you are too highly sensitized, (another term used to describe high PRA's,) to receive a transplant ask about Plasmapheresis. If they don’t offer it there, speak to another transplant center.


Harvey Mysel is a kidney transplant recipient and Founder of the Living Kidney Donors Network, a nonprofit organization that offers Workshops and Get-Togethers to educate people in need of a kidney transplant about living kidney donation and helps prepare them to effectively communicate their need to family members and friends. The Living Kidney Donors Network website is: www.lkdn.org and Harvey could be reached at: harvey@lkdn.org or follow him on Twitter www.twitter.com/harveymysel