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Related Concept Videos

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

149
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...
149
Serum Studies: Renal Function Tests01:24

Serum Studies: Renal Function Tests

324
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.
324
Factors Affecting Renal Clearance: Renal Impairment01:17

Factors Affecting Renal Clearance: Renal Impairment

385
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...
385
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

147
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.
147
Renal Clearance01:23

Renal Clearance

2.3K
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...
2.3K
Renal Drug Clearance: Comparison Between Renal Excretion Methods01:08

Renal Drug Clearance: Comparison Between Renal Excretion Methods

525
Renal clearance is a critical parameter encompassing kidney filtration, secretion, and reabsorption processes. It is calculated using a specific equation to determine the rate at which the kidneys clear a drug.
Renal clearance is often associated with the renal glomerular filtration rate (GFR), which represents the rate at which plasma is filtered through the glomeruli in the kidney. When drug reabsorption is minimal and there is no active secretion, renal clearance is closely related to the...
525

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Transdermal Measurement of Glomerular Filtration Rate in Mechanically Ventilated Piglets
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Creatinine: From physiology to clinical application.

Kianoush Kashani1, Mitchell H Rosner2, Marlies Ostermann3

  • 1Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN, United States; Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN, United States.

European Journal of Internal Medicine
|November 12, 2019
PubMed
Summary
This summary is machine-generated.

Accurately assessing kidney function is vital. This review explores the limitations of serum creatinine, a common kidney function biomarker, and discusses alternatives for better interpretation.

Keywords:
CreatineCreatinineCystatin CGFRKidney functionMuscle massSarcopenia

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Area of Science:

  • Nephrology
  • Biomarker Discovery
  • Clinical Chemistry

Background:

  • Accurate estimation of static kidney function and timely detection of changes are crucial clinical challenges.
  • Serum creatinine is the predominant biomarker for kidney function assessment.
  • Current limitations in serum creatinine usage hinder precise interpretation and translation into clinical action.

Purpose of the Study:

  • To critically evaluate the established role of serum creatinine as a biomarker of kidney function.
  • To elucidate the pathways of creatinine generation, metabolism, and measurement techniques.
  • To explore alternative biomarkers for improved kidney function assessment.

Main Methods:

  • Literature review focusing on creatinine metabolism and measurement.
  • Analysis of the advantages and disadvantages of serum creatinine.
  • Compilation of information on alternative kidney function biomarkers.

Main Results:

  • Detailed discussion of creatinine's generation, metabolism, and assay methodologies.
  • Identification of significant shortcomings associated with serum creatinine interpretation.
  • Presentation of alternative functional biomarkers for kidney assessment.

Conclusions:

  • Understanding creatinine's biochemical pathways and measurement pitfalls is essential for accurate kidney function evaluation.
  • Serum creatinine, despite widespread use, possesses limitations that necessitate careful interpretation.
  • Alternative biomarkers offer potential for more precise and timely assessment of kidney function.