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Related Concept Videos

Nephrotic Syndrome II : Assessment and Medical Management01:26

Nephrotic Syndrome II : Assessment and Medical Management

IntroductionNephrotic syndrome is a kidney disorder marked by excessive protein loss in the urine, leading to various systemic complications. This condition often results from damage to the glomeruli—the kidney's filtering units—causing proteinuria, low blood protein levels, and fluid retention. Understanding the assessment, diagnosis, and management of nephrotic syndrome is essential for effective treatment and prevention of further kidney damage.AssessmentPatient History: Document any history...
Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate01:25

Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate

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...
Serum Studies: Renal Function Tests01:24

Serum Studies: Renal Function Tests

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.
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

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. This equation is...
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

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 (Clcr), a...
Renal Clearance01:23

Renal Clearance

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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Related Experiment Video

Updated: Jun 28, 2026

Analyses of Proteinuria, Renal Infiltration of Leukocytes, and Renal Deposition of Proteins in Lupus-prone MRL/lpr Mice
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Analyses of Proteinuria, Renal Infiltration of Leukocytes, and Renal Deposition of Proteins in Lupus-prone MRL/lpr Mice

Published on: June 8, 2022

How to measure proteinuria?

Natasha J McIntyre1, Maarten W Taal

  • 1Department of Renal Medicine, Derby Hospitals NHS Foundation Trust and Centre for Integrated Systems in Biology and Medicine, University of Nottingham, UK.

Current Opinion in Nephrology and Hypertension
|October 23, 2008
PubMed
Summary

Urine protein-to-creatinine ratio is recommended for monitoring nondiabetic chronic kidney disease. Urine albumin-to-creatinine ratio is best for detecting microalbuminuria in diabetic nephropathy.

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09:16

Assessment of Kidney Function in Mouse Models of Glomerular Disease

Published on: June 30, 2018

Area of Science:

  • Nephrology
  • Clinical Chemistry

Background:

  • Chronic kidney disease (CKD) monitoring relies on accurate protein assessment.
  • Traditional 24-hour urine collections are cumbersome.
  • Urine protein-to-creatinine ratio (UPCR) and urine albumin-to-creatinine ratio (UACR) offer convenient alternatives.

Purpose of the Study:

  • To compare the utility of urine total protein versus albumin measurements in CKD assessment and monitoring.
  • To guide the appropriate use of UPCR and UACR in different CKD populations.

Main Methods:

  • Review of studies comparing UPCR and UACR in CKD patients.
  • Analysis of the role of each marker in current renoprotective strategies.
  • Evaluation of the diagnostic and prognostic significance of both markers.

Main Results:

  • Single-voided UPCR and UACR measurements are reliable alternatives to 24-hour collections.
  • Most renoprotective strategies are based on UPCR.
  • UACR is essential for detecting microalbuminuria, particularly in diabetic nephropathy.
  • The albumin proportion in total urine protein varies with renal disease etiology.

Conclusions:

  • UPCR is recommended for monitoring nondiabetic CKD.
  • UACR should be used for microalbuminuria detection and monitoring diabetic nephropathy.
  • Further research is needed on the relationship between total protein and albumin in various renal diseases and their comparative prognostic value.