what does hemodialysis remove
Guide. Chronic kidney disease and acute kidney injury (also known as acute renal failure) cause the kidneys to lose their ability to filter and remove waste and extra fluid from the body. Hemodialysis is a process that uses a man-made membrane (dialyzer) to: 1  Remove wastes, such as urea, from the blood. 2  Restore the proper balance of electrolytes in the blood. 3  Eliminate extra fluid from the body.