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Renal failure occurs when the kidneys lose their ability to filter waste products from the blood effectively. It can be classified into two types: acute renal failure (ARF) and chronic renal failure (CRF).
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Updated: May 10, 2025

Measurement of Tissue Oxygenation Using Near-Infrared Spectroscopy in Patients Undergoing Hemodialysis
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Dialysis and cognitive impairment.

Chris W McIntyre1,2, Arsh Jain3

  • 1Lilibeth Caberto Kidney Clinical Research Unit, Lawson Health Research Institute, London, Ontario, Canada. cmcint48@uwo.ca.

Nature Reviews. Nephrology
|April 24, 2025
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Summary
This summary is machine-generated.

Maintenance dialysis accelerates cognitive decline in chronic kidney disease patients. This effect, often overlooked, impacts patients, caregivers, and healthcare systems, necessitating further investigation into its mechanisms and interventions.

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Area of Science:

  • Nephrology
  • Neurology
  • Cognitive Science

Background:

  • Chronic kidney disease (CKD) patients on maintenance dialysis exhibit faster cognitive decline than those with advanced kidney disease not on dialysis.
  • This cognitive impairment is significant for patients, caregivers, and healthcare systems but often underestimated.
  • Comorbidities in CKD patients can affect brain health, but dialysis itself is increasingly implicated in cognitive decline.

Purpose of the Study:

  • To explore the mechanisms underlying dialysis-induced cognitive decline in CKD patients.
  • To review established and potential pathophysiological pathways linking dialysis to brain changes.
  • To consider therapeutic interventions for mitigating cognitive impairment in this population.

Main Methods:

  • Review of existing literature on dialysis and cognitive function in CKD.
  • Analysis of evidence implicating dialysis therapy in brain structure and function changes.
  • Exploration of potential therapeutic strategies, both single and complex.

Main Results:

  • Both hemodialysis and peritoneal dialysis are associated with structural and functional brain alterations.
  • Dialysis can lead to short-term neurological symptoms like confusion and brain fog.
  • Long-term effects include progressive reductions in cognitive functional ability.

Conclusions:

  • Dialysis therapy plays a central role in the pathophysiology of progressive cognitive impairment in CKD patients.
  • Understanding these mechanisms is crucial for developing effective interventions.
  • Further research and therapeutic approaches are needed to address dialysis-related cognitive decline.