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Related Concept Videos

Factors Affecting Renal Clearance: Renal Impairment01:17

Factors Affecting Renal Clearance: Renal Impairment

Renal dysfunction significantly impairs the renal clearance of drugs, leading to potential complications in drug therapy. Renal failure, which can be caused by various factors, poses a significant challenge in the elimination of drugs from the body.
One condition associated with renal failure is uremia. Uremia is characterized by impaired glomerular filtration and fluid accumulation in the body. This condition hinders the renal clearance of drugs, resulting in drug accumulation and potential...
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.
Renal Failure: Dose Adjustments01:11

Renal Failure: Dose Adjustments

In patients with renal impairment, drugs undergo significant changes in their pharmacokinetics, which require dosage adjustments to ensure safe and effective therapy.
Reduced renal clearance and elimination rate are common outcomes of renal impairment. These alterations lead to a prolonged elimination half-life and an altered apparent volume of distribution for drugs. As a result, dosage adjustments are typically necessary to maintain optimal drug levels in the body.
However, dosage adjustments...
Acute Kidney Injury I: Introduction01:22

Acute Kidney Injury I: Introduction

Introduction:Acute Kidney Injury (AKI) describes a swift decrease in kidney function occurring over hours to days, characterized by the kidneys' failure to remove waste products from the bloodstream. This leads to dangerous complications like metabolic acidosis, fluid overload, and electrolyte imbalances, such as hyperkalemia, which can cause life-threatening arrhythmias. AKI is common in both hospital and outpatient settings, often triggered by dehydration, sepsis, or exposure to nephrotoxic...
Acute Kidney Injury IV: Diagnostic Studies and Prevention01:30

Acute Kidney Injury IV: Diagnostic Studies and Prevention

Accurate diagnosis and effective prevention are critical in managing Acute Kidney Injury (AKI), which is linked to high mortality rates ranging from 10% to 80%. Timely recognition of at-risk patients and careful monitoring can significantly reduce the likelihood of kidney damage.Diagnostic Assessments:The diagnostic process starts with a comprehensive medical history to identify prerenal, intrarenal, and postrenal causes.Prerenal causes, such as dehydration, hypotension, or blood loss, should...
Acute Kidney Injury III: Clinical Manifestations01:29

Acute Kidney Injury III: Clinical Manifestations

Acute Kidney Injury (AKI) progresses through distinct clinical phases: the oliguric, diuretic, and recovery phases, each marked by unique manifestations and challenges.Oliguric Phase:The oliguric phase is the initial stage of AKI, typically lasting 10 to 14 days. This phase is marked by a significant reduction in urine output, usually less than 400 mL per day, indicating decreased kidney function. Fluid retention is a prominent feature, leading to symptoms such as edema, hypertension, and...

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Related Experiment Video

Updated: May 13, 2026

Physiology Lab Demonstration: Glomerular Filtration Rate in a Rat
06:58

Physiology Lab Demonstration: Glomerular Filtration Rate in a Rat

Published on: July 26, 2015

Renal function status.

Joshua Becker1, Eli Friedman

  • 1Department of Radiology, New York University Langone Medical Center, 535 E 86th St., New York, NY 10028-7533, USA. Joshua.Becker@nyumc.org

AJR. American Journal of Roentgenology
|March 26, 2013
PubMed
Summary

Accurately assessing kidney function relies on measured glomerular filtration rate (mGFR). Common tests like serum creatinine and estimated GFR (eGFR) are insufficient replacements for mGFR, highlighting their limitations.

Area of Science:

  • Nephrology
  • Clinical Chemistry
  • Renal Physiology

Background:

  • Accurate assessment of renal status is crucial for patient management.
  • Various biomarkers and formulas are used to estimate kidney function.
  • Understanding the limitations of these estimations is vital for clinical practice.

Purpose of the Study:

  • To review and evaluate the parameters used in determining renal status.
  • To compare the accuracy of different methods for assessing kidney function.
  • To emphasize the importance of measured glomerular filtration rate (mGFR).

Main Methods:

  • Literature review of studies evaluating renal function parameters.
  • Analysis of the accuracy and limitations of serum creatinine, blood urea nitrogen, cystatin C, and estimated GFR (eGFR).

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A Large Animal Model for Acute Kidney Injury by Temporary Bilateral Renal Artery Occlusion
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A Large Animal Model for Acute Kidney Injury by Temporary Bilateral Renal Artery Occlusion

Published on: February 2, 2021

Related Experiment Videos

Last Updated: May 13, 2026

Physiology Lab Demonstration: Glomerular Filtration Rate in a Rat
06:58

Physiology Lab Demonstration: Glomerular Filtration Rate in a Rat

Published on: July 26, 2015

A Large Animal Model for Acute Kidney Injury by Temporary Bilateral Renal Artery Occlusion
09:02

A Large Animal Model for Acute Kidney Injury by Temporary Bilateral Renal Artery Occlusion

Published on: February 2, 2021

  • Comparison of these methods against measured GFR (mGFR).

    • Main Results:

    • Measured GFR (mGFR) remains the gold standard for assessing renal function.
    • Serum creatinine, blood urea nitrogen, cystatin C, and eGFR have limitations and have not replaced mGFR.
    • The accuracy of substituted mGFR methods is insufficient for comprehensive renal status determination.

    Conclusions:

    • Physiologic determination of renal status is mGFR.
    • Serum creatinine, BUN, cystatin C, and eGFR are inadequate replacements for mGFR.
    • Physicians must be aware of the limitations of substituted mGFR for accurate diagnosis and treatment.