Hemodialysis is a boon for

Malfunctioning of kidneys can lead to uremia, accumulation of urea in blood. Uremia is highly harmful and may lead to kidney failure. In uremic patients, urea can be removed by a process called hemodialysis. In hemodialysis, blood from a convenient artery is pumped into a machine (artificial kidney) which filters wastes from the blood. The cleared blood is pumped back to the body through a vein.