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Semipermeable Membrane

A thin sheet, or layer, of tissue that lines a body cavity or separates two parts of the body.

PubMed Health Glossary
(Source: NIH - National Institute of Diabetes and Digestive and Kidney Diseases)

About Semipermeable Membranes

A semipermeable membrane can act as a filter, allowing some particles to pass from one part of the body to another while keeping other particles in place. In hemodialysis, the artificial membrane in a dialyzer acts as the semipermeable membrane filtering waste products from the blood. In peritoneal dialysis, the peritoneum acts as the semipermeable membrane. NIH - National Institute of Diabetes and Digestive and Kidney Diseases

Terms to know

Dialysis
The process of filtering the blood when the kidneys are not able to cleanse it.
Dialyzer
An attachment to the hemodialysis machine. The dialyzer has two sections separated by a semipermeable membrane. One section holds dialysis solution. The other holds the patient's blood.
Hemodialysis
The use of a machine to clean wastes from the blood after the kidneys have failed. The blood travels through tubes to a dialyzer, a machine that removes wastes and extra fluid. The cleaned blood then flows through another set of tubes back into the body.
Peritoneal Dialysis
Filtering the blood by using the lining of the abdominal cavity, or belly, as a semipermeable membrane.
Peritoneum
The tissue that lines the abdominal wall and covers most of the organs in the abdomen.

Terms to know

Dialysis
The process of filtering the blood when the kidneys are not able to cleanse it....
Dialyzer
An attachment to the hemodialysis machine. The dialyzer has two sections separated by a semipermeable membran...
Hemodialysis
The use of a machine to clean wastes from the blood after the kidneys have failed. The blood travels through...
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