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Dialysis Disequilibrium Syndrome Revisited.

Mandeep M Sahani1, Tarek M Daoud1, Ramin Sam1

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Dialysis disequilibrium syndrome (DDS) can cause severe neurological symptoms in azotemic patients. Preventive strategies, including adjusting dialysis efficiency and osmolality, are crucial for patient safety.

Keywords:
Dialysis disequilibriumbrain acidosisidiogenic osmolesreverse urea effect

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Area of Science:

  • Nephrology
  • Neurology
  • Critical Care Medicine

Background:

  • Aggressive dialysis in azotemic patients, particularly with metabolic acidosis, risks Dialysis Disequilibrium Syndrome (DDS).
  • DDS manifests with neurological symptoms ranging from mild nausea to severe seizures and coma.
  • Cerebral edema, driven by the reverse urea effect, cerebrospinal fluid acidosis, or idiogenic osmoles, underlies DDS.

Purpose of the Study:

  • To outline the mechanisms and clinical manifestations of Dialysis Disequilibrium Syndrome (DDS).
  • To emphasize the importance of preventive measures for DDS in patients with severe uremia.
  • To describe strategies for mitigating DDS during dialysis treatment.

Main Methods:

  • Review of mechanisms causing cerebral edema during dialysis.
  • Description of clinical presentations of Dialysis Disequilibrium Syndrome.
  • Explanation of preventive strategies for Dialysis Disequilibrium Syndrome.

Main Results:

  • Dialysis Disequilibrium Syndrome is caused by cerebral edema.
  • Key mechanisms include the reverse urea effect, cerebrospinal fluid acidosis, and idiogenic osmoles.
  • Preventive measures are vital for patients undergoing dialysis.

Conclusions:

  • Dialysis Disequilibrium Syndrome presents a significant risk during aggressive dialysis for azotemic patients.
  • Preventive strategies involve modulating dialysis efficiency and blood osmolality.
  • Prompt intervention with anticonvulsants may be necessary if preventive measures fail.