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Donating a kidney is even safer now than long thought, US study shows

WASHINGTON (AP) 鈥 People who volunteer to donate a kidney face an even lower risk of death from the operation than doctors have long thought, researchers reported Wednesday.
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FILE - Surgeons work on a kidney during a transplant surgical procedure in Washington on June 28, 2016. (AP Photo/Molly Riley, File)

WASHINGTON (AP) 鈥 People who volunteer to donate a kidney face an even lower risk of death from the operation than doctors have long thought, researchers reported Wednesday.

The study tracked 30 years of living kidney donation and found that by 2022, fewer than 1 of every 10,000 donors died within three months of the surgery. Transplant centers have been using older data 鈥 citing a risk of 3 deaths per 10,000 living donors 鈥 in counseling donors about potentially deadly surgical complications.

鈥淭he last decade has become a lot more safe in the operating room for living donors,鈥 said Dr. Dorry Segev, a transplant surgeon at NYU Langone Health. He co-authored the study published in the journal JAMA.

Newer surgical techniques are the key reason, said Segev, calling for guideline updates to reflect those safety improvements 鈥 and maybe increase interest in living donation.

He often finds transplant recipients more worried about potential risks to their donors than the would-be donors themselves.

鈥淔or them, this is even more reassuring to allow their friends or family to donate on their behalf,鈥 Segev said.

for an organ transplant. It鈥檚 possible for living donors to give a one of their two kidneys or part of a liver, the only organ that regenerates.

With nearly 90,000 people on the U.S. list for a kidney transplant, finding a living donor not only shortens the yearslong wait -- those organs also tend to survive longer than ones from deceased donors.

Yet last year, just 6,290 of the nation鈥檚 more than 27,000 kidney transplants came from living donors, the most since before the pandemic. to living donation. So is awareness, as many patients are reluctant to ask. And while the recipient鈥檚 insurance covers medical bills, some donors face expenses such as travel or lost wages as they recover.

The NYU team analyzed U.S. records of more than 164,000 living kidney donations from 1993 through 2022 and found 36 post-surgical deaths. Most at risk were male donors and those with a history of high blood pressure.

Only five of those deaths occurred since 2013. That period coincided with U.S. transplant centers switching to minimally invasive kidney removal as well as adopting a better way to stop renal artery bleeding, Segev said.

鈥淥ver time, it鈥檚 a safe operation that鈥檚 become even safer,鈥 important for would-be donors to know, said Dr. Amit Tevar of the University of Pittsburgh Medical Center, who wasn鈥檛 involved in the study.

But there are to consider, too, he stressed -- including whether a donor鈥檚 remaining kidney is expected to last the rest of their life.

The risk of a donor later experiencing kidney failure also is small and depends on such factors as obesity, high blood pressure, smoking and family history of kidney disease. Risk calculators help doctors determine a potential donor's likelihood of later-in-life trouble, and transplant centers may have slightly different eligibility criteria.

鈥淭here鈥檚 no such thing as a moderate- or high-risk donor 鈥 either you鈥檙e perfect or you鈥檙e not,鈥 is how Tevar puts the decision to accept or turn away a potential donor.

Doctors once thought young adults were the ideal living donor. But Segev said there鈥檚 a shift toward more older living donors because it鈥檚 easier to correctly predict that they won鈥檛 outlive their remaining kidney.

If a living donor later experiences kidney failure, they get priority for a transplant, he noted.

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The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute鈥檚 Science and Educational Media Group. The AP is solely responsible for all content.

Lauran Neergaard, The Associated Press