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Related Concept Videos

Glomerular Filtration01:15

Glomerular Filtration

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The filtration membrane in the renal system is a highly specialized structure essential for filtering blood. It consists of glomerular capillaries and podocytes, forming a selective barrier that permits the passage of water and small solutes while restricting most plasma proteins and blood cells.
Components of the Filtration Membrane
The filtration process involves three key layers: the glomerular endothelial cells, the basement membrane, and the podocyte-formed filtration slits.
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Nephrotic Syndrome I : Introduction01:24

Nephrotic Syndrome I : Introduction

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Nephrotic Syndrome is a chronic kidney disorder defined by clinical findings such as severe proteinuria, hypoalbuminemia, hyperlipidemia, and edema. These symptoms result from damage to the glomeruli, the kidney’s filtering units, increasing their permeability to proteins.Definition and Meaning:Proteinuria, defined as the loss of more than 3.5 grams of protein per day in adults, is a crucial feature of nephrotic syndrome. This condition is often accompanied by edema, the accumulation of...
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Glomerular Filtration Rate and its Regulation01:28

Glomerular Filtration Rate and its Regulation

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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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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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Physiology of the Genitourinary System I: Renal Blood Flow and Glomerular Filtration01:29

Physiology of the Genitourinary System I: Renal Blood Flow and Glomerular Filtration

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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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Formation of Dilute Urine01:20

Formation of Dilute Urine

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The formation of dilute urine is a critical renal adaptation that maintains fluid balance, particularly during periods of high fluid intake. This process primarily involves the juxtamedullary nephrons. By adjusting the permeability of water and ions in response to physiological conditions, the kidneys can either conserve or excrete water, resulting in concentrated or dilute urine.
Filtrate Osmolarity in the PCT
Initially, as the filtrate passes through the proximal convoluted tubule (PCT), its...
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Related Experiment Video

Updated: Jul 24, 2025

An Efficient Sieving Method to Isolate Intact Glomeruli from Adult Rat Kidney
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An Efficient Sieving Method to Isolate Intact Glomeruli from Adult Rat Kidney

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Selective glomerular hypofiltration syndrome.

Borja Quiroga1, Alberto Ortiz2,3, Javier Díez4,5

  • 1IIS-La Princesa, Nephrology Department, Hospital Universitario de la Princesa, Madrid, Spain.

Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association
|July 5, 2023
PubMed
Summary
This summary is machine-generated.

Selective glomerular hypofiltration syndrome (SGHS), indicated by a low eGFRcys:eGFRcrea ratio, is linked to higher cardiovascular disease and mortality risks. Further research is needed to clarify its pathophysiology and clinical implications.

Keywords:
cardiovascular diseasecreatininecystatin Cendothelial poresglomerular filtration rate

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Area of Science:

  • Nephrology
  • Cardiology
  • Biomarkers

Background:

  • Estimated glomerular filtration rate (eGFR) aids cardiovascular disease (CVD) risk assessment.
  • Combining eGFR from cystatin C (eGFRcys) and creatinine (eGFRcrea) may improve CVD risk stratification.
  • Selective glomerular hypofiltration syndrome (SGHS) is defined by an eGFRcys:eGFRcrea ratio <1.

Purpose of the Study:

  • To critically review the concept of SGHS.
  • To explore its pathophysiological basis and links to CVD.
  • To discuss clinical implications and propose a research agenda.

Main Methods:

  • Literature review of SGHS concept and evidence.
  • Analysis of pathophysiological mechanisms.
  • Discussion of clinical relevance and future research directions.

Main Results:

  • SGHS is hypothesized to involve reduced filtration of 5-30 kDa molecules.
  • SGHS is associated with increased CVD and mortality risks.
  • Prevalence of SGHS is variable and depends on non-standardized cut-offs.

Conclusions:

  • SGHS may offer insights into GFR disorders and CVD mechanisms.
  • Muscle wasting is a potential confounder for the eGFRcys:eGFRcrea ratio.
  • Further research is required on SGHS pathophysiology, reference values, and clinical impact.