A very brief dialysis definition is provided here as background to understanding the occupation and duties of a dialysis technician.
A definition of medical dialysis is "a process for removing waste and excess water from the blood". It is primarily used to provide a replacement process for lost or reduced kidney function. It helps remove harmful wastes, extra salt and water. A Dutch physician, Willem Johan Kolff, constructed the first working dialyzer in 1943.
A diagram of the hemodialysis process is shown below. The patients blood is pumped through a dialyzer which has a semipermeable membrane. Dialysis solution flows around the membrane. Water and excess dissolved solutes such as urea, creatinine, potassium and phosphorus are removed from the blood and concentrated in the dialysis solution.
There is also a peritoneal dialysis process where blood is cleaned inside your body. A simple diagram of this is shown below. A plastic tube called a catheter is surgically placed into your abdomen (belly) to make an access. During the treatment, your abdominal area is slowly filled with dialysis solution through the catheter. The blood stays in the arteries and veins that line your peritoneal cavity. Extra fluid and waste products are drawn out of your blood and into the dialysis solution. After a time, the dialysis solution with the absorbed waste products is drained out a tube and discarded. With this background, you can now better understand the Dialysis Technician description on the following page.