In renal physiology, the filtration fraction is the ratio of the glomerular filtration rate (GFR) over the renal plasma flow (RPF).
Filtration Fraction, FF = GFR/RPF, or .
The filtration fraction, therefore, represents the proportion of the fluid reaching the kidneys that passes into the renal tubules. It is normally about 20%.
GFR on its own is the most common and important measure of renal function. However, in conditions such as renal artery stenosis, blood flow to the kidneys is reduced. Filtration fraction must therefore be increased in order to perform the normal functions of the kidney. Loop diuretics and thiazide diuretics decrease filtration fraction.
Catecholamines (norepinephrine and epinephrine) increase filtration fraction by vasoconstriction of afferent and efferent arterioles, possibly through activation of alpha-1 adrenergic receptors.
Severe hemorrhage will also result in an increased filtration fraction.
and 27 Related for: Filtration fraction information
physiology, the filtrationfraction is the ratio of the glomerular filtration rate (GFR) over the renal plasma flow (RPF). FiltrationFraction, FF = GFR/RPF...
volume per time, e.g., milliliters per minute (mL/min). Compare to filtrationfraction. G F R = Urine Concentration × Urine Flow Plasma Concentration {\displaystyle...
volume per time, e.g., milliliters per minute (mL/min). Compare to filtrationfraction.[citation needed] G F R = Urine Concentration × Urine Flow Plasma...
Filtration is a physical separation process that separates solid matter and fluid from a mixture using a filter medium that has a complex structure through...
In cell biology, cell fractionation is the process used to separate cellular components while preserving individual functions of each component. This...
term applied in various geometrical models and electronic devices Filtrationfraction, in renal physiology Frasnian-Famennian extinction (F-F), also known...
blood that passes through the kidneys (PAH undergoes both glomerular filtration and tubular secretion), and therefore the rate at which the kidneys can...
substance is completely cleared from the blood per unit time. The filtrationfraction is the amount of plasma that is actually filtered through the kidney...
greater blood flow to the glomerulus. Note that there is no change in filtrationfraction, as both GFR and RPF are increased. It also results in the release...
Na+ reabsorption. It has a complex and variable effect on glomerular filtration and renal blood flow depending on the setting. Increases in systemic blood...
II–induced efferent arteriolar tone, leading to a drop in glomerular filtrationfraction and GFR. The efferent arteriolal vasodilation reduces intraglomerular...
the glomerular filtration rate, depending on the level of oncotic increase in the capillaries, resulting in a decreased filtrationfraction. Afferent arteriole...
urinary bladder, and urethra. The system produces urine by a process of filtration, reabsorption, and tubular secretion. The kidneys extract the soluble...
II–induced efferent arteriolar tone, leading to a drop in glomerular filtrationfraction and GFR. The efferent arteriolal vasodilation reduces intraglomerular...
"gold standard" for comparison with other means of estimating glomerular filtration rate. Inulin is a natural storage carbohydrate present in more than 36...
mechanical separation of gas and liquid streams. In the simplest case, filtration is achieved when the pores of the membrane are smaller than the diameter...
buffer used to pre-equilibrate the gel-filtration matrix, while the small molecules can be collected in a later fraction volume or be left trapped in the resin...
substance (usually a pharmacological drug) by the liver. It is defined as the fraction of drug removed from blood by the liver, and depends on 3 factors— the...
form and most commonly used for gel filtration columns. By varying the degree of cross-linking, the fractionation properties of the gel can be altered...
Heart failure with preserved ejection fraction (HFpEF) is a form of heart failure in which the ejection fraction – the percentage of the volume of blood...
Supercritical fluid extraction Subcritical fluid extraction Field flow fractionationFiltration – Mesh, bag and paper filters are used to remove large particulates...
Microfiltration is a type of physical filtration process where a contaminated fluid is passed through a special pore-sized membrane filter to separate...
Blood plasma fractionation are the general processes separating the various components of blood plasma, which in turn is a component of blood obtained...
Global Information