Filtration fraction
Filtration Fraction
Filtration fraction (pronunciation: fil-tray-shun frak-shun) is a term used in physiology to describe the proportion of the blood plasma that is filtered by the kidney.
Etymology
The term "filtration fraction" is derived from the Latin words "filtrare" meaning to filter, and "fractio" meaning a fraction or part.
Definition
Filtration fraction is defined as the fraction of the total plasma volume that is filtered by the glomerulus of the kidney. It is calculated as the ratio of the glomerular filtration rate (GFR) to the renal plasma flow (RPF).
Formula
The formula for calculating filtration fraction is:
Filtration Fraction = GFR / RPF
Where:
- GFR is the Glomerular Filtration Rate
- RPF is the Renal Plasma Flow
Related Terms
- Glomerular filtration rate: The volume of fluid filtered from the renal (kidney) glomerular capillaries into the Bowman's capsule per unit time.
- Renal plasma flow: The volume of blood plasma that is filtered by the kidney per unit time.
- Renal physiology: The study of the physiology of the kidney.
- Glomerulus: A network of tiny blood vessels in the kidney where filtration of blood takes place.
See Also
External links
- Medical encyclopedia article on Filtration fraction
- Wikipedia's article - Filtration fraction
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