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  2. Assessment of kidney function - Wikipedia

    en.wikipedia.org/wiki/Assessment_of_kidney_function

    The Glomerular filtration rate (GFR) is regarded as the best overall measure of the kidney's ability to carry out these numerous functions. An estimate of the GFR is used clinically to determine the degree of kidney impairment and to track the progression of the disease. The GFR, however, does not reveal the source of the kidney disease.

  3. Glomerular filtration rate - Wikipedia

    en.wikipedia.org/wiki/Glomerular_filtration_rate

    After filtration, Cystatin C is reabsorbed and catabolized by the tubular epithelial cells, with only small amounts excreted in the urine. Cystatin C levels are therefore measured not in the urine, but in the bloodstream. Equations have been developed linking estimated GFR to serum cystatin C levels. [16]

  4. Cystatin C - Wikipedia

    en.wikipedia.org/wiki/Cystatin_C

    In this case, cystatin C-based estimates of GFR, eGFR cystatin C, will be lower than creatinine-based estimates eGFR creatinine, so that a hypothesized condition, named shrunken pore syndrome, is identified by a low eGFR cystatin C /eGFR creatinine-ratio. [medical citation needed] [55] This syndrome is associated with a very strong increase in ...

  5. Kidney failure - Wikipedia

    en.wikipedia.org/wiki/Kidney_failure

    Chronic kidney failure is measured in five stages, which are calculated using the person's GFR, or glomerular filtration rate. Stage 1 CKD is mildly diminished renal function, with few overt symptoms. Stages 2 and 3 need increasing levels of supportive care from their medical providers to slow and treat their renal dysfunction.

  6. Andrew S. Levey - Wikipedia

    en.wikipedia.org/wiki/Andrew_S._Levey

    Levey is known for developing the most widely used equations to estimate GFR (renal function) globally.He pioneered work with the MDRD Study Equation, [1] led the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI), which pooled measured kidney function CKD data from studies all over the world to develop equations to estimate kidney function from serum creatinine, cystatin C, and ...

  7. Renal clearance ratio - Wikipedia

    en.wikipedia.org/wiki/Renal_clearance_ratio

    C x is the renal plasma clearance of X C in is the renal plasma clearance of inulin . Creatinine is sometimes used instead of inulin as the reference substance; for example, the calcium-creatinine clearance ratio is used in an attempt to distinguish between different causes of a high plasma calcium concentration. [ 3 ]

  8. Creatinine - Wikipedia

    en.wikipedia.org/wiki/Creatinine

    The IDMS method would result in comparative overestimation of the corresponding calculated GFR in some patients with normal renal function. A few medicines are dosed even in normal renal function using that derived value of GFR. The dose, unless further modified, could then be higher than desired, potentially causing increased drug-related ...

  9. Diabetic nephropathy - Wikipedia

    en.wikipedia.org/wiki/Diabetic_nephropathy

    Cystatin C is a protein that is freely filtered in the glomeruli before it is reabsorbed and catabolized in the renal tubular cells. Its serum level is independent of muscle mass, making more accurate at estimating GFR than creatinine serum levels. [citation needed]

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