Dementia associated with dialysis is linked to which metal?

• A. Aluminum
• B. Lead
• C. Mercury
• D. Cadmium

Answer: (A)

Dialysis dementia is classically caused by aluminum toxicity. In patients with kidney failure, aluminum from contaminated dialysate and from aluminum-containing phosphate binders can accumulate because the kidneys cannot excrete it effectively. Aluminum in the brain disrupts neural function and can lead to cognitive decline and dementia, historically described as dialysis encephalopathy. Modern practice avoids aluminum exposure by using purified water for dialysis and non-aluminum binders, preventing this complication. The other metals listed can be neurotoxic, but they are not the classic cause of dialysis-associated dementia.