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Related Concept Videos

Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate01:25

Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate

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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...
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Renal Drug Excretion: Glomerular Filtration01:02

Renal Drug Excretion: Glomerular Filtration

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The kidney serves as the primary organ responsible for eliminating drugs and their metabolites from the body. This process, known as renal elimination, starts with glomerular filtration and results in urine formation. Each kidney houses millions of functional units called nephrons, where urine production occurs. A nephron has two main components: a renal corpuscle and a renal tubule.
Drugs gain access to the kidney via the renal artery, which progressively branches off into afferent arterioles....
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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

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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.
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Glomerular Filtration Rate and its Regulation01:28

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The Glomerular Filtration Rate (GFR) is a measure of kidney function, reflecting the volume of filtrate formed per minute in the kidneys. On average, GFR is approximately 125 mL/min in males and 105 mL/min in females. Maintaining a relatively constant GFR is essential for the kidneys to effectively regulate body fluid homeostasis and maintain extracellular stability.
GFR regulation involves two primary intrinsic controls: the myogenic and tubuloglomerular feedback mechanisms.
The myogenic...
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Physiology of the Genitourinary System I: Renal Blood Flow and Glomerular Filtration01:29

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The kidneys are vital organs responsible for regulating blood filtration, waste excretion, and fluid balance, all of which are crucial for maintaining homeostasis. Renal physiology examines renal blood flow, glomerular filtration, and urine formation, ensuring the body’s internal environment remains stable.Renal Blood FlowThe kidneys receive about 20-25% of the cardiac output, typically around 1200 mL of blood per minute in an average adult. Blood flows into the kidneys through the renal...
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Renal Clearance01:23

Renal Clearance

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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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Physiology Lab Demonstration: Glomerular Filtration Rate in a Rat
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Determining the Glomerular Filtration Rate-An Overview.

Elke Schaeffner1

  • 1Institute of Public Health Charité, Universitätsmedizin Berlin, Berlin, Germany.

Journal of Renal Nutrition : the Official Journal of the Council on Renal Nutrition of the National Kidney Foundation
|September 21, 2017
PubMed
Summary
This summary is machine-generated.

Accurate kidney function assessment using glomerular filtration rate (GFR) is crucial for clinical decisions. This review guides clinicians through GFR estimation and measurement complexities, covering biomarkers and methods.

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Area of Science:

  • Nephrology
  • Clinical Chemistry

Background:

  • Accurate determination of glomerular filtration rate (GFR) is vital for clinical decision-making.
  • A vast amount of literature on GFR estimation and measurement has been published recently.
  • Clinicians face challenges due to the rapid pace of new GFR estimation formulas, biomarkers, and measurement techniques.

Purpose of the Study:

  • To provide a concise review of central issues in determining kidney function.
  • To guide clinicians through the complexities of GFR determination.
  • To summarize key publications and fundamental principles in GFR estimation and measurement.

Main Methods:

  • Literature review focusing on significant publications in GFR determination.
  • Explanation of fundamental principles in GFR estimation and measurement.
  • Discussion of the influence of clinical characteristics on endogenous biomarkers and assessment obstacles.

Main Results:

  • The review synthesizes information on novel estimation formulae, biomarkers, and assay standardization.
  • It addresses challenges in biomarker assessment and the impact of clinical factors.
  • Key publications are highlighted to aid understanding.

Conclusions:

  • This review serves as a guide for clinicians navigating the complex landscape of GFR determination.
  • It simplifies understanding of GFR estimation and measurement principles.
  • It aims to clarify the role of biomarkers and overcome assessment obstacles in kidney function evaluation.