Clinical Hemodialysis - Hardcoverby Sean Eastwood (Editor) Hemodialysis is a machine aided process that purifies blood for people suffering from acute kidney disease. It is one of the three types of renal replacement therapies. A person requires dialysis if their kidneys are not able to remove the wastes and fluids from their bloodstream. Dialysis utilizes a dialysis machine and a specific filter known as an artificial kidney to filter creatinine, urea, potassium and free water from