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2. Assessment of kidney function - Wikipedia

   en.wikipedia.org/wiki/Assessment_of_kidney_function

   Creatinine clearance exceeds GFR due to creatinine secretion, [4] which can be blocked by cimetidine. Both GFR and C Cr may be accurately calculated by comparative measurements of substances in the blood and urine, or estimated by formulas using just a blood test result ( eGFR and eC Cr ) The results of these tests are used to assess the ...

3. Glomerular filtration rate - Wikipedia

   en.wikipedia.org/wiki/Glomerular_filtration_rate

   The glomerular filtration rate is the flow rate of filtered fluid through the kidney. The creatinine clearance rate (C Cr 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. Creatinine clearance exceeds GFR due to creatinine secretion, [1] which can be blocked by ...

4. Creatinine - Wikipedia

   en.wikipedia.org/wiki/Creatinine

   Therefore, creatinine concentrations in blood and urine may be used to calculate the creatinine clearance (CrCl), which correlates approximately with the glomerular filtration rate (GFR). Blood creatinine concentrations may also be used alone to calculate the estimated GFR (eGFR). The GFR is clinically important as a measurement of kidney function.

5. Fractional excretion of sodium - Wikipedia

   en.wikipedia.org/wiki/Fractional_excretion_of_sodium

   This is the numerator in the equation. The denominator is the total amount of sodium filtered by the kidneys. This is calculated by multiplying the plasma sodium concentration by the glomerular filtration rate (GFR) calculated using creatinine filtration. The flow rates then cancel out, simplifying to the standard equation: [1]

6. Augmented renal clearance - Wikipedia

   en.wikipedia.org/wiki/Augmented_renal_clearance

   For this reason, kidney function (and thus medication elimination) has been approximated by measuring creatinine clearance, or calculating an estimated glomerular filtration rate (eGFR), since 1976. [2] Beginning in the late 1970s, an increase in the creatinine clearance had been observed in burn patients.

7. Renal physiology - Wikipedia

   en.wikipedia.org/wiki/Renal_physiology

   Estimated using inulin. Usually a creatinine clearance test is performed but other markers, such as the plant polysaccharide inulin or radiolabelled EDTA, may be used as well. filtration fraction = [17] Measures portion of renal plasma that is filtered. anion gap