Hemodialysis is a medical procedure used to treat patients with end-stage kidney disease or severe kidney dysfunction. Hemodialysis machines are the primary equipment used in this procedure. 

Hemodialysis is a process that involves filtering waste products, excess fluids, and toxins from the blood when the kidneys are unable to perform this function adequately. The procedure works by diverting the patient's blood through a dialyzer, also known as an artificial kidney.