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Related Concept Videos

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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Acute Kidney Injury II: Pathophysiology01:29

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Acute kidney injury (AKI) causes are categorized into three primary categories based on the location of the injury: prerenal, intrarenal (or intrinsic), and postrenal causes. This classification guides clinical management and illustrates how different pathways can impair kidney function.Etiology and Pathophysiology of Acute Kidney Injury1. Prerenal causesEtiology: Prerenal Acute Kidney Injury, the most common type, occurs when reduced blood flow to the kidneys decreases filtration capacity...
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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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Glomerular Filtration: Net Filtration Pressure01:26

Glomerular Filtration: Net Filtration Pressure

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Glomerular filtration, a key process in the kidneys, is regulated by three main pressures: Glomerular blood hydrostatic pressure (GBHP), Capsular hydrostatic pressure (CHP), and Blood colloid osmotic pressure (BCOP).
GBHP, with an average value of 55 mmHg, promotes filtration by pushing water and solutes through the filtration membrane. This is balanced by two opposing forces: CHP, a "back pressure" exerted against the filtration membrane by fluid already in the capsular space and renal...
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Renal Drug Excretion: Glomerular Filtration01:02

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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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Renal Corpuscle01:20

Renal Corpuscle

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The glomerulus and Bowman's capsule are two essential components of the nephron, which is the functional unit of the kidney. These microscopic structures play a critical role in the process of blood filtration to produce urine.
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous...
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Related Experiment Video

Updated: Feb 18, 2026

Physiology Lab Demonstration: Glomerular Filtration Rate in a Rat
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Physiology Lab Demonstration: Glomerular Filtration Rate in a Rat

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[How to explain glomerular filtration rate decrease in intra-abdominal hypertension?]

Vincent Dupont1, Alexandre Debrumetz1, Alain Wynckel1

  • 1Service de néphrologie, CHU de Reims, 45, rue Cognacq-Jay, 51092 Reims cedex, France.

Nephrologie & Therapeutique
|November 28, 2017
PubMed
Summary
This summary is machine-generated.

Intra-abdominal hypertension (IAH) monitoring using intravesical pressure (IVP) is crucial for critical care patients. Improved IVP monitoring can enhance understanding of IAH and its link to acute kidney injury (AKI).

Keywords:
Acute kidney injuryDébit de filtration glomérulaireGlomerular filtration rateHypertension intra-abdominaleInsuffisance rénale aiguëIntra-abdominal hypertensionIntravesical pressurePression intravésicale

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Using 2-Photon Microscopy to Quantify the Effects of Chronic Unilateral Ureteral Obstruction on Glomerular Processes
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Area of Science:

  • Critical care medicine
  • Nephrology
  • Physiology

Background:

  • Intra-abdominal hypertension (IAH) is a common, severe complication in critical care patients.
  • Diagnosis and monitoring of IAH typically involve intravesical pressure (IVP) measurement.
  • Current IVP monitoring practices may be insufficient due to knowledge gaps in IAH pathophysiology.

Purpose of the Study:

  • To highlight the importance of IVP monitoring in patients at risk for IAH.
  • To emphasize the association between IAH and acute kidney injury (AKI).
  • To explore the physiopathological mechanisms linking IAH to decreased glomerular filtration rate (GFR).

Main Methods:

  • Review of current literature on IAH and AKI.
  • Discussion of the role of intravesical pressure (IVP) in IAH diagnosis.
  • Analysis of the physiopathology of AKI in the context of IAH, including renal venous congestion and GFR changes.

Main Results:

  • IAH is frequently associated with acute kidney injury (AKI), with severity correlating to IAH.
  • Decreased glomerular filtration rate (GFR) in IAH is multifactorial, involving renal venous congestion and reduced renal plasmatic flow.
  • Intravesical pressure (IVP) monitoring is essential for understanding IAH and its renal impact.

Conclusions:

  • Enhanced understanding of IAH pathophysiology is needed to establish therapeutic targets.
  • Regular IVP monitoring in at-risk patients is vital for improving clinical practice and patient outcomes.
  • Addressing IAH and its impact on renal function, particularly AKI, requires further research and improved monitoring strategies.