Get expert care for Kidney Dialysis, Hemodialysis, and Peritoneal Dialysis in Ahmedabad & Gandhinagar. Dr. Nisarg Parekh offers advanced kidney care solutions. The purpose of dialysis is to treat people whose kidneys are failing. In kidney failure, the kidneys no longer filter the blood as they should, causing waste products and toxins to build up in the bloodstream. Dialysis removes waste products and excess fluid from the blood by taking over the function of the kidneys, often sending the blood to a machine that cleans it. Hemodialysis : This is a procedure in which a machine filters your blood using a dialyzer, a membrane that removes excess fluid and waste. During the procedure, a qualified technician monitors the machine and checks your vital signs. Most people get hemodialysis three to four days a week at a hospital or dialysis clinic.