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Related Concept Videos

Renal Failure: Dose Adjustments01:11

Renal Failure: Dose Adjustments

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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...
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Dialysis01:27

Dialysis

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Renal failure occurs when the kidneys lose their ability to filter waste products from the blood effectively. It can be classified into two types: acute renal failure (ARF) and chronic renal failure (CRF).
Acute kidney injury develops suddenly and can be caused by pre-renal causes (e.g., hypovolemia, shock), intrinsic renal causes (e.g., acute tubular necrosis), or post-renal causes (e.g., urinary obstruction). In contrast, chronic renal failure progresses gradually over time and is often...
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Factors Affecting Renal Clearance: Renal Impairment01:17

Factors Affecting Renal Clearance: Renal Impairment

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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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Renal Drug Excretion: Tubular Secretion01:28

Renal Drug Excretion: Tubular Secretion

175
Active tubular secretion is a robust, energy-demanding process that utilizes carrier systems to transport drugs into renal tubules. The active renal secretion systems include the organic anion transporter (OAT) for weak acids and the organic cation transporter (OCT) for weak bases. Structurally similar drugs can compete for the same transporter, potentially leading to drug accumulation and toxicity. However, this principle can be exploited therapeutically. One example is probenecid (Probalan),...
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Renal Drug Excretion: Tubular Reabsorption01:25

Renal Drug Excretion: Tubular Reabsorption

166
Tubular reabsorption, a process occurring post-glomerular filtration of drugs in the renal tubule, is a critical determinant of drug half-life. During the process of renal excretion, as the glomerular filtrate progresses to the distal convoluted tubule (DCT), drugs that are highly permeable, lipophilic, and nonionized undergo passive reabsorption from the tubular fluid into the surrounding peritubular capillaries. This reabsorption process restricts their elimination through the kidneys. This...
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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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Unilateral Ureteral Obstruction Model for Investigating Kidney Interstitial Fibrosis
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Focus on oliguria during renal replacement therapy.

Qian Zhang1, Xiaoting Wang2, Yangong Chao3

  • 1Department of Intensive Care Unit (ICU), The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, 550004, People's Republic of China.

Journal of Anesthesia
|May 22, 2024
PubMed
Summary
This summary is machine-generated.

Oliguria, or decreased urine output, during renal replacement therapy can signal worsening kidney injury. This review explores its mechanisms and proposes a clinical pathway for managing acute kidney injury patients.

Keywords:
Acute kidney injuryOliguriaRenal oxygen consumptionRenal oxygen deliveryRenal replacement therapy

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Area of Science:

  • Nephrology
  • Critical Care Medicine

Background:

  • Oliguria, a hallmark of reduced urine output, complicates acute kidney injury (AKI) management.
  • It can occur during renal replacement therapy (RRT), necessitating careful evaluation.

Purpose of the Study:

  • To investigate the mechanisms underlying oliguria in patients undergoing RRT.
  • To propose a clinical management pathway for AKI patients experiencing oliguria during RRT.

Main Methods:

  • Review of urine production mechanisms.
  • Analysis of oliguria causes related to diminished glomerular filtration rate and tubular abnormalities.
  • Examination of renal oxygen supply-demand imbalance in AKI.

Main Results:

  • Oliguria during RRT is linked to decreased glomerular filtration and tubular dysfunction.
  • These conditions indicate a renal oxygen supply-demand imbalance, signaling progressive kidney injury.
  • Potential resolution with blood purification or fluid management adjustments exists.

Conclusions:

  • Oliguria during RRT requires thorough investigation into its underlying causes.
  • A structured clinical pathway can guide the management of AKI patients with oliguria.
  • Addressing renal oxygen imbalance is crucial for improving outcomes.