Related Experiment Video
Updated: Jun 23, 2026
09:43
Analyses of Proteinuria, Renal Infiltration of Leukocytes, and Renal Deposition of Proteins in Lupus-prone MRL/lpr Mice
Published on: June 8, 2022
How should proteinuria be detected and measured?
Edmund J Lamb1, Finlay MacKenzie, Paul E Stevens
1Department of Clinical Biochemistry, East Kent Hospital University NHS Foundation Trust, Canterbury, Kent, UK. Edmund.lamb@ekht.nhs.uk
Annals of Clinical Biochemistry
|April 25, 2009
Summary
Proteinuria testing guidelines vary significantly. Using urinary albumin measurement as the primary test for proteinuria offers improved early detection and management of chronic kidney disease (CKD).
Area of Science:
- Nephrology
- Clinical Chemistry
Background:
- Proteinuria is a key indicator of kidney disease with significant prognostic value.
- Current clinical practice guidelines show considerable variation in defining clinically significant proteinuria.
- Disagreement exists on whether to measure albumin or total protein, with differing approaches for diabetic and non-diabetic nephropathy.
Purpose of the Study:
- To review current national and international guidelines on chronic kidney disease (CKD).
- To explore variations in proteinuria definition and assessment methods.
- To evaluate the role of reagent strip devices in proteinuria detection.
Main Methods:
- Review of recent national and international CKD guidelines.
- Analysis of epidemiological evidence linking proteinuria to clinical outcomes.
- Comparative assessment of urinary albumin versus total protein measurement.
Main Results:
- Significant inconsistencies found in the definition of clinically significant proteinuria across guidelines.
- Unclear role and utility of reagent strip devices for proteinuria assessment.
- Divergent strategies for stratifying diabetic and non-diabetic kidney disease based on proteinuria.
Conclusions:
- Urinary albumin measurement should be the preferred front-line test for proteinuria detection.
- Adopting urinary albumin measurement can enhance sensitivity, quality, and consistency in early CKD detection and management.
- Standardizing proteinuria assessment is crucial for improving patient outcomes in CKD.
Related Concept Videos
01:26Nephrotic 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...
01:25Drug 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...
01:24Serum 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.
01:29Urine Studies I: Urinalysis
Urinalysis is a widely used diagnostic test that analyzes urine's physical, chemical, and microscopic characteristics. Healthcare providers use it to detect and monitor various health conditions, including renal disease, urinary tract infections (UTIs), diabetes, and metabolic or systemic disorders.Components of UrinalysisUrinalysis consists of three primary components: physical, chemical, and microscopic examination. Each provides unique insights into the urine sample and, by extension, the...
01:25Drug 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...
01:28Drug 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...