(The term stallion for an uncastrated male horse dates from this time; stallion = stalled one.) Stallion is also used to refer to males of other equids, including zebras and donkeys.
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.
Hemodialysis is a treatment for kidney failure. Hemodialysis uses a machine to filter your blood outside your body. First, a dialysis nurse places two needles into your arm. A pump on the hemodialysis machine draws your blood through one of the needles into a tube.