What causes metabolic acidosis in patients with advanced chronic kidney disease?

Updated: Oct 10, 2018
  • Author: Christie P Thomas, MBBS, FRCP, FASN, FAHA; Chief Editor: Vecihi Batuman, MD, FASN  more...
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Answer

Patients with advanced chronic kidney disease (glomerular filtration rate of less than 20 mL/min) present with a high-AG acidosis. The acidosis occurs from reduced ammoniagenesis leading to a decrease in the amount of H+ buffered in the urine. The increase in AG is thought to occur because of the accumulation of sulfates, urates and phosphates from a reduction in glomerular filtration and from diminished tubular function.


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