Hemodialysis is a medical treatment used to filter waste and excess fluids from the blood when the kidneys are not functioning properly. It is a common treatment for patients with chronic kidney disease or acute kidney failure.
How Hemodialysis Works
A special access point is created, often in the arm, where blood can be withdrawn and returned. This is done through a fistula (an artificial connection between an artery and vein), a graft (a synthetic tube connecting an artery and vein), or a central venous catheter.
Blood is drawn from the body through the access point and passed through a dialysis machine. The machine contains a filter called a dialyzer, which removes waste products and excess fluids from your blood.
The dialyzer, often referred to as an artificial kidney, contains a semi-permeable membrane that allows waste products and excess fluids to pass through while retaining essential blood cells and proteins.
After the blood is filtered, it is returned to the body through the same access point.
Types of Hemodialysis
Performed at a dialysis center, usually three times a week, with each session lasting about 3-5 hours.
Done at home, either during the day or at night while sleeping. This requires specialized training and equipment.