Dialysis Definition
Dialysis Description

Dialysis Definition

A very brief dialysis definition is provided here as background to understanding the career and job 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 diagram of the hemodialysis process is shown on the left. 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  also shown on the lower left. 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 job description on the following page.

 

Information on this page summarized from:
(1)  Wikipedia contributors, "Dialysis," Wikipedia, The Free Encyclopedia,https://en.wikipedia.org/wiki/Dialysis
(2) Hemodialysis diagram author is Yassine Mrabetis and is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported, 2.5 Generic, 2.0 Generic and 1.0 Generic license from the Wikepedia reference above.
(3) Peritoneal dialysis diagram is authored by  the National Kidney and Urologic Diseases Information Clearinghouse, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, US . In the public domain as a work of the US Federal Government under the terms of Title 17, Chapter 1, Section 105 of the US Code.

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