advertisement
02 December 2008

The effect of kidney failure on the brain and nervous system

When kidneys fail to fulfill their function, it affects the brain and nervous system.

0
Uremia
Kidneys normally remove extra water and wastes from you blood. If they fail, blood levels of urea increase. Urea is toxic to the body and can affect all the major organs including the brain. Symptoms usually only appear when kidney function falls to less than 10 percent of normal. It precedes uremic coma and causes disorders of memory, thinking, speech, perception, emotions and other neurological manifestations.

Dialysis
When urea is removed from the blood too quickly during dialysis, a net movement of fluid into the brain seems to occur. This is quite rare and causes headache, double vision, nausea and vomiting. Tremors and seizures may follow.

Dialysis dementia is a progressive disease found in some patients on long-term haemodialysis. The cause of this disease is still controversial, but thought to be due to the deposition of aluminum in the brains of those patients. In order to avoid this complication the water used for dialysis is purified by a process called reverse osmosis. The intake of aluminum-containing phosphate binders is also limited.

Written by Dr K. Coetzee, reviewed by Dr R. Moosa, head of the Renal Unit, Tygerberg Academic Hospital.

Read more:
Incontinence, Urinary
Healthy toilet habits

National Kidney Foundation

 
advertisement

Get a quote

advertisement

Read Health24’s Comments Policy

Comment on this story
0 comments
Add your comment
Comment 0 characters remaining

Live healthier

Winter Wellness »

Boost winter health Happy feet in winter Don’t become a winter blimp

Tips to stay fit and healthy in winter

When it's cold it's easy to pick up the coughs and sniffles, and it's even easier to indulge in comfort foods. Don't !

Vitamin wise »

Vitamins for HIV What to eat for vitamin B? Cut down on vitamins

Get your vitamins right

Find out which vitamin to use for which condition. Ask our Vitamin expert.