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Kidney function expected to wane with age

By Keith Roach, M.D. on

DEAR DR. ROACH: I am a 75-year-old male, 5 feet, 3 inches tall, weighing 123 pounds with a blood pressure of 110/60. The only known ailment I have is hypothyroidism, which is being treated. I recently began seeing a new primary care physician who ordered a series of bloodwork. The bloodwork came back showing a glomerular flow rate of 55, which is the same value it was in 2016.

The new PCP is telling me I have stage 3 renal failure. She has ordered an ultrasound of my kidneys, which will be done this week. Every other test that she has ordered to evaluate kidney function has been negative as far as any value being out of the normal range. She has not suggested that I see a specialist, but is basing all this on her own knowledge and tests. I have decided I will not do any other tests or begin any treatment until I see a kidney specialist. I might add that the reason I saw this physician in the first place was because of extreme fatigue and anxiety. How concerned should I be with this diagnosis? -- M.L.N.

ANSWER: Your kidney function (measured by the glomerular filtration rate) has not changed; what has changed is the way the numbers are reported. GFR reliably goes down as we age. A GFR level of 55 is within the expected range for a man in his 70s. Since yours hasn't changed in three years, you are unlikely to develop end-stage renal failure (where you would need dialysis), even if you lived to 110.

My own patients, as well as many readers, have been alarmed by hearing they have stage 3 kidney failure. Physicians need to explain the results better to avoid worrying our older patients, in whom a degree of reduced kidney function is common and expected.

The kidney function is not likely to be responsible for fatigue, but I fear the anxiety might be worse after getting these results. I trust your kidney specialist will be able to explain your results. The kidney specialists I spoke to have been seeing many people with concerns similar to yours.

DEAR DR. ROACH: How much do doctors get for prescribing certain brand name drugs? -- D.B.

ANSWER: It is a serious breach of professional ethics and of federal law to receive any kind of payment to "induce or reward patient referrals or the generation of business involving any item or service payable by the federal health care programs (e.g., drugs, supplies or health care services) for Medicare or Medicaid patients. Remuneration includes anything of value and can take many forms besides cash, such as free rent, expensive hotel stays and meals, and excessive compensation for medical directorships or consultancies" (quotes are from the office of the Inspector General for the Department of Health and Human Services). If you have evidence that a physician is breaking these laws, you should report him or her to the inspector general at https://oig.hhs.gov/fraud/report-fraud/index.asp.

 

Physicians may still receive money from drug companies and medical device manufacturers, and not be illegal or fraudulent, so long as the payments are not to reward or induce illegal or unethical behavior. However, these payments are part of the public record and can be searched at openpaymentsdata.cms.gov/search/. It might be worthwhile knowing whether your physician is accepting money (such as for travel or meals) from pharmaceutical companies. In 2018, $9.35 billion was provided to physicians and hospitals from such companies, mostly to support research, but also for education.

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Dr. Roach regrets that he is unable to answer individual letters, but will incorporate them in the column whenever possible. Readers may email questions to ToYourGoodHealth@med.cornell.edu or send mail to 628 Virginia Dr., Orlando, FL 32803.

(c) 2020 North America Syndicate Inc.

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