Dialysis is a filtration process. In 1961, Thomas Graham discovered that a parchment membrane immersed in water allowed salts to pass through while retaining proteins.
What is peritoneal dialysis (PD)?
Peritoneal dialysis (PD) utilizes the peritoneum as natural filter to cleanse the blood of waste products.
A soft tube, or catheter, is surgically inserted into the abdominal wall to facilitate this process. The catheter remains permanently in place, allowing dialysis fluid to enter the abdominal cavity and absorb waste and excess fluid from the blood.
After several hours, the used dialysis fluid is drained, and fresh fluid is introduced. This process of removing and replacing fluid is known as an exchange.
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What is hemodialysis?
Hemodialysis is a procedure that purifies the blood by passing it through a filter known as an "artificial kidney" or dialyzer.