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Related Concept Videos

Renal Drug Clearance: Overview01:06

Renal Drug Clearance: Overview

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Renal clearance is a crucial parameter in pharmacokinetics that quantifies the rate at which the kidneys excrete a drug. It represents a constant fraction of the central volume of distribution containing the drug that the kidney eliminates per unit of time.
Renal clearance can be calculated using different methods. One approach is to divide the urinary drug excretion rate by the plasma drug concentration. This method directly measures renal clearance, indicating the kidneys' efficiency in...
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Renal Drug Clearance: Comparison Between Renal Excretion Methods01:08

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Renal clearance is a critical parameter encompassing kidney filtration, secretion, and reabsorption processes. It is calculated using a specific equation to determine the rate at which the kidneys clear a drug.
Renal clearance is often associated with the renal glomerular filtration rate (GFR), which represents the rate at which plasma is filtered through the glomeruli in the kidney. When drug reabsorption is minimal and there is no active secretion, renal clearance is closely related to the...
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Renal Clearance01:23

Renal Clearance

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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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Factors Affecting Renal Clearance: Renal Impairment01:17

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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...
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Factors Affecting Renal Clearance: Drug Distribution and Drug Interactions01:09

Factors Affecting Renal Clearance: Drug Distribution and Drug Interactions

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Renal clearance plays a pivotal role in drug elimination from the body and can be influenced by drug distribution and interactions. Understanding these factors is crucial in pharmacology as they impact the effectiveness and duration of drug therapy.
One important factor is the relationship between renal clearance and the apparent volume of distribution. Renal clearance tends to be inversely proportional to the apparent volume of distribution. Drugs with an extensive distribution volume or those...
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Drug Dosing in Renal Diseases: Measurement of Serum Creatinine Concentration and Clearance01:25

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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...
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Optical Clearing and Imaging of Immunolabeled Kidney Tissue
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Augmented renal clearance.

Arthur J Atkinson1

  • 1Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA.

Translational and Clinical Pharmacology
|February 15, 2020
PubMed
Summary
This summary is machine-generated.

Critically ill patients may experience augmented renal clearance (ARC), a condition where kidney function exceeds normal levels. This can alter drug dosages, necessitating accurate diagnosis through specific creatinine clearance measurements.

Keywords:
Antimicrobial agentsAugmented renal clearanceCritically ill patientsDrug dose requirements

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Area of Science:

  • Nephrology
  • Critical Care Medicine
  • Clinical Pharmacology

Background:

  • Critically ill patients often exhibit augmented renal clearance (ARC), exceeding 130 mL/min/1.73 m2.
  • The pathogenesis of ARC is not fully understood, adding complexity to patient care.
  • ARC can lead to altered drug pharmacokinetics, particularly for renally eliminated medications.

Purpose of the Study:

  • To highlight the clinical significance of augmented renal clearance in critically ill patients.
  • To emphasize the limitations of standard equations in estimating renal function in ARC.
  • To underscore the importance of accurate diagnosis for appropriate medication management.

Main Methods:

  • Review of existing literature on augmented renal clearance.
  • Analysis of diagnostic challenges associated with ARC.
  • Discussion of implications for drug dosing in critically ill populations.

Main Results:

  • Augmented renal clearance is a recognized phenomenon in critically ill patients.
  • Standard creatinine-based equations inaccurately estimate renal function in ARC.
  • Accurate ARC diagnosis requires specific serum and urine creatinine measurements.

Conclusions:

  • Recognizing and diagnosing ARC is crucial for optimizing drug therapy in critically ill patients.
  • Clinical suspicion and targeted diagnostic testing are essential for confirming ARC.
  • Further research into ARC pathogenesis and management is warranted.