How does dialysis work?

Dialysis can be done in a hospital, in a dialysis unit that is not part of a hospital, or at home. You and your doctor will decide which place is best, based on your medical condition and your wishes. There are two types of dialysis -- hemodialysis and peritoneal dialysis.

When your kidneys are functioning properly, they remove waste, fluids, and salts from your blood, all of which are then passed through the urine. When kidneys are in failure, this waste builds up in the blood, causing many complications that, over time, can become severe. Therefore, if you have been diagnosed with kidney failure, your doctor may prescribe dialysis.

Hemodialysis, the most common form of dialysis, works like an artificial kidney by filtering out the toxins in the blood. Blood is drawn from the body through a tube, then filtered through a machine called a dialyzer. After the blood is filtered by the dialyzer, it is pumped back into your body through a second tube. A second type of dialysis, called peritoneal dialysis, works in the same way, except that blood is filtered through a catheter inserted into the abdominal area.

Continue Learning about Dialysis


Healthy kidneys remove waste from your blood and produce hormones your body needs. If your kidneys fail, you either need a kidney transplant or dialysis. Dialysis is a procedure that uses a machine to perform many of the functions ...

of the kidney. Dialysis can help prevent problems resulting from kidney failure and it allows people with kidney failure to live productive lives. Dialysis filters your blood, and like a health kidney, removes waste from your blood. Patients using dialysis are also required to follow a strict diet in order to stay healthy. There are two types of dialysis: hemodialysis and peritoneal dialysis. There are different advantages and disadvantages with both hemodialysis and peritoneal dialysis. Talk to your doctor about which type of dialysis would work better for you.

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.