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Related Concept Videos

Renal Clearance01:23

Renal Clearance

3.2K
The glomerular filtration rate (GFR) is a critical marker of kidney function, reflecting the efficiency of filtration by the glomeruli. Renal clearance of specific substances, such as inulin or creatinine, is commonly used to measure GFR.
Renal clearance refers to the volume of plasma cleared of a specific substance, such as creatinine, per unit of time. To measure clearance, urine samples are collected over a 24-hour period during each bladder voiding, followed by a single blood sample at the...
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Factors Affecting Renal Clearance: Renal Impairment01:17

Factors Affecting Renal Clearance: Renal Impairment

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Renal dysfunction significantly impairs the renal clearance of drugs, leading to potential complications in drug therapy. Renal failure, which can be caused by various factors, poses a significant challenge in the elimination of drugs from the body.
One condition associated with renal failure is uremia. Uremia is characterized by impaired glomerular filtration and fluid accumulation in the body. This condition hinders the renal clearance of drugs, resulting in drug accumulation and potential...
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Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate01:25

Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate

143
The glomerular filtration rate (GFR) is a critical indicator of kidney health, reflecting how well the kidneys filter blood. Changes in GFR can signal potential kidney impairment, necessitating accurate measurement methods to monitor kidney function effectively.Various molecules can serve as markers for GFR measurement, with the ideal marker meeting several specific criteria. It must freely filter at the glomerulus, avoid reabsorption or secretion by the renal tubules, remain unmetabolized, not...
143
Drug Dosing in Renal Diseases: Measurement of Serum Creatinine Concentration and Clearance01:25

Drug Dosing in Renal Diseases: Measurement of Serum Creatinine Concentration and Clearance

371
In healthy individuals, serum creatinine levels remain stable due to a balance between its constant production—primarily from muscle metabolism—and renal excretion. Creatinine is freely filtered by the glomeruli, making it a valuable marker for estimating renal function. When the glomerular filtration rate (GFR) decreases, the kidneys can only eliminate less creatinine, causing serum levels to rise.Serum creatinine concentration is widely used to estimate creatinine clearance...
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Drug Dosing in Renal Diseases: Estimation of Glomerular Filtration Rate Based on Serum Creatinine Concentration01:28

Drug Dosing in Renal Diseases: Estimation of Glomerular Filtration Rate Based on Serum Creatinine Concentration

337
Glomerular filtration rate (GFR) can be estimated from serum creatinine using the modification of diet in renal disease (MDRD) formula or the chronic kidney disease–epidemiology collaboration (CKD–EPI) equation. Both methods are widely used in clinical practice to assess kidney function and guide treatment decisions.The MDRD equation does not require weight or height measurements and is normalized to the body surface area of 1.73 m², considered the average adult surface area.
337
Serum Studies: Renal Function Tests01:24

Serum Studies: Renal Function Tests

688
Renal function tests are crucial for assessing kidney health, monitoring disease progression, and evaluating the kidneys' efficiency in waste elimination, fluid balance, and electrolyte regulation. These tests offer critical insights into kidney function, even though routine measurements may appear normal until there is a significant decline in the glomerular filtration rate or GFR. Typically, signs of kidney impairment only become evident when the GFR falls to about 50% of its normal level.
688

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Assessment of Glomerular Filtration Rate in Health and Disease: A State of the Art Review.

Clinical pharmacology and therapeutics·2017
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Filtration Markers, Cardiovascular Disease, Mortality, and Kidney Outcomes in Stable Kidney Transplant Recipients: The FAVORIT Trial.

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Estimated GFR for Living Kidney Donor Evaluation.

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Kidney function and risk of cardiovascular disease and mortality in kidney transplant recipients: the FAVORIT trial.

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A High-throughput Method for Measurement of Glomerular Filtration Rate in Conscious Mice
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Serum creatinine and renal function.

A S Levey1, R D Perrone, N E Madias

  • 1Department of Medicine, New England Medical Center Hospitals, Boston, Massachusetts.

Annual Review of Medicine
|January 1, 1988
PubMed
Summary

Serum creatinine is not a reliable indicator of kidney function or disease progression. More sensitive measures are needed to accurately assess glomerular filtration rate (GFR) and monitor renal disease.

Area of Science:

  • Nephrology
  • Biochemistry

Background:

  • Serum creatinine is commonly used to assess kidney function.
  • However, serum creatinine levels are influenced by factors beyond renal excretion, including generation, intake, and metabolism.
  • This complexity limits its accuracy as a sole indicator of renal health.

Purpose of the Study:

  • To critically evaluate the utility of serum creatinine as a measure of renal function.
  • To assess the accuracy of using the slope of reciprocal serum creatinine versus time to track renal disease progression.
  • To advocate for the use of more precise methods for estimating glomerular filtration rate (GFR) and disease progression.

Main Methods:

  • Literature review and critical analysis of existing studies on serum creatinine and renal function.

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  • Examination of the physiological determinants of serum creatinine levels.
  • Evaluation of mathematical models used to assess renal disease progression.

    • Main Results:

    • Serum creatinine alone is an inadequate marker for estimating glomerular filtration rate (GFR).
    • The slope of the reciprocal of serum creatinine versus time does not accurately reflect the rate of renal disease progression.
    • Current interpretations of serum creatinine may be misleading in clinical practice.

    Conclusions:

    • More sensitive and accurate biomarkers are essential for evaluating renal function and GFR.
    • Clinical practice should adopt advanced methods for monitoring renal disease progression.
    • Accurate assessment is crucial for effective management of progressive renal diseases as treatments emerge.