I always tell potential kidney donors to keep an open mind but to do their homework and be as well informed about living donation as they can be. Turns out that that advice even applies years later.
Through social media donor support groups, I recently was stunned and outraged to learn that some donors have been told that they have stage 3 chronic kidney disease. One donor said she cried all night. Before you conclude that their “disease” is a result of kidney donation, I hasten to add that these were people with normal kidney function. In other words, as researchers have demonstrated, those living donors DO NOT HAVE CHRONIC KIDNEY DISEASE! Their slightly low readings are perfectly normal for them.
Apparently, their primary care providers—and, unbelievably, sometimes even nephrologists—were referring to the eGFR (estimated glomerular filtration rate) scale based on people with two kidneys and/or real kidney disease. Donors lose 25 to 35% of their pre-donation kidney function, but that’s still sufficient to lead a healthy normal life. It’s meaningless and patently wrong to look at the numbers in a vacuum and say that these people have chronic kidney disease.
As we get older, no matter how many kidneys we have, our kidney function declines. It’s especially common for people over 70, like me, to have a slightly low eGFR. At my last check-up, though, 13 years after donating my kidney to my son, my eGFR was 69 (normal is over 60).
So, if you are a kidney donor, don’t be alarmed at news of a slightly high eGFR. Ask questions (how long has it been in that range? what’s your creatinine?), and always remind your provider that you have one kidney. You may well be relieved to know that your new normal is just fine!