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'Domino' transplant program makes best use of altruistic donated kidneys

A team of Johns Hopkins researchers reporting their early experiences with "domino" kidney donation suggest that wider use of this strategy could effectively double the benefit of the organs from these non-directed, altruistic living donors.

In a paper published in the August issue of the British journal Lancet, the team, led by Robert A. Montgomery, M.D., chief of transplantation at the Johns Hopkins University School of Medicine, show that by serving the needs of multiple recipients, such domino transplants can maximize the benefits of these donors' altruistic acts.

Under the terms of the domino-paired donation program, a kidney transplant patient who has a willing but incompatible living organ donor is matched with an altruistic, compatible donor. The incompatible kidney from the recipient's intended donor is then domino-matched with the next compatible patient on the United Network of Organ Sharing (UNOS) waiting list. This strategy can be further used to enable a triple transplant by simply adding an additional incompatible donor-recipient pair to the chain.

However, because there is currently no national system of this kind in place, Montgomery says altruistic donor kidneys often end up on an Internet donation site or at individual transplant centers and so are subject to variable ethical criteria. For example, in some cases, the kidney goes to the patient deemed to have the best chance for long-term survival; in others, the organ is given to the patient in greatest need or the candidate at the top of the UNOS waiting list, regardless of outcome or need.

"With domino-paired donation, all three of these ethical tenets are satisfied," says Montgomery. Specifically, the likelihood of a good outcome is increased by spreading the risk of recipient graft loss across more people. The neediest patients are served, since in many cases patients with incompatible donors suffer disproportionately long waiting times. Those on t
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Contact: Eric Vohr
evohr1@jhmi.edu
410-955-8665
Johns Hopkins Medical Institutions
27-Jul-2006


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