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A major measure of kidney function is the glomerular filtration rate ( GFR ). The glomerular filtration rate is the flow rate of filtered fluid through the kidney. The creatinine clearance rate ( CCr or CrCl) is the volume of blood plasma that is cleared of creatinine per unit time and is a useful measure for approximating the GFR.
Blood tests are also used to assess kidney function. These include tests that are intended to directly measure the function of the kidneys, as well as tests that assess the function of the kidneys by looking for evidence of problems associated with abnormal function. One of the measures of kidney function is the glomerular filtration rate (GFR).
In the physiology of the kidney, renal blood flow ( RBF) is the volume of blood delivered to the kidneys per unit time. In humans, the kidneys together receive roughly 25% of cardiac output, amounting to 1.2 - 1.3 L/min in a 70-kg adult male. [ 1] It passes about 94% to the cortex. RBF is closely related to renal plasma flow ( RPF ), which is ...
Renal physiology. This illustration demonstrates the normal kidney physiology, including the Proximal Convoluted Tubule (PCT), Loop of Henle, and Distal Convoluted Tubule (DCT). It also includes illustrations showing where some types of diuretics act, and what they do. Renal physiology ( Latin rēnēs, "kidneys") is the study of the physiology ...
Kidney failure, also known as end-stage renal disease ( ESRD ), is a medical condition in which the kidneys can no longer adequately filter waste products from the blood, functioning at less than 15% of normal levels. [ 2] Kidney failure is classified as either acute kidney failure, which develops rapidly and may resolve; and chronic kidney ...
Nephrotic syndrome is a collection of symptoms due to kidney damage. This includes protein in the urine, low blood albumin levels, high blood lipids, and significant swelling. Other symptoms may include weight gain, feeling tired, and foamy urine. Complications may include blood clots, infections, and high blood pressure.
Pyelonephritis is inflammation of the kidney, typically due to a bacterial infection. [ 3 ] Symptoms most often include fever and flank tenderness. [ 2 ] Other symptoms may include nausea, burning with urination, and frequent urination. [ 2 ] Complications may include pus around the kidney, sepsis, or kidney failure.
Effective renal plasma flow (eRPF) is a measure used in renal physiology to calculate renal plasma flow (RPF) and hence estimate renal function. Because the extraction ratio of PAH is high, it has become commonplace to estimate the RPF by dividing the amount of PAH in the urine by the plasma PAH level, ignoring the level in renal venous blood ...