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Dialysis Departments of Srijan
Dialysis is the process by which the blood is cleansed artificially rather than by the kidneys. The term
dialysis is derived from the Greek word meaning to separate.

During dialysis, metabolic wastes and excess fluids are separated and removed from the patients’
blood. There are two types of dialysis:-

  • Hemodialysis
  • Peritoneal dialysis
Hemodialysis
The first artificial kidney machine was developed in 1943 by Dr.Willem Kolff. Hemodialysis is derived from two words, hemo, meaning blood and dialysis. Today, it has become the most commonly performed type of dialysis. Hemodialysis treatments are required three days per week, and each treatment lasts about four hours.


Peritoneal Dialysis

Peritoneal dialysis is usually self administered. In both hemodialysis and peritoneal dialysis, the blood is cleansed. However, in peritoneal dialysis the process takes place within the patients own body, in the peritoneal or abdominal cavity, rather than outside the body in a machine. The peritoneum is a thin membrane which covers the instestines and other contents of the abdominalcavity. During dialysis, the dialysate is introduced into the abdominal cavity, allowed to stay in for some time, and then drained out. The peritoneum basically functions the same as the semipermeable membrane used in the artifical kidney machine. Since it contains a whole network of tiny blood vessels called capillaries, the peritoneum is constantly able to provide a new supply of blood to be filtered. As blood flows through the peritoneum, waste products are filtered (through diffusion) and excess fluids are removed (through osmosis). The wastes flow into the dialysate which remains or dwells within the abdominal cavity for a variable period of time. At the end of this period the dialysate is drained from the abdomen and fresh dialysate is introduced.