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Related Concept Videos

Renal Regulation of Acid-Base Balance01:29

Renal Regulation of Acid-Base Balance

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Metabolic reactions in the body produce nonvolatile acids, such as sulfuric acid, which generate an acid load of approximately 1 mEq of H+ per kilogram of body weight daily. Excreting H+ in the urine is essential to balance this acid load.
In the kidneys, cells within the proximal convoluted tubules (PCT) and the collecting ducts secrete hydrogen ions (H+) into the tubular fluid. Specifically, in the PCT, Na+/H+ antiporters secrete H+ while reabsorbing Na+.
However, the intercalated cells in...
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Acute Kidney Injury V: Interprofessional Care01:20

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Acute Kidney Injury (AKI) requires a collaborative healthcare approach to restore renal function and prevent complications. Essential management strategies involve monitoring fluid and electrolyte balance, adjusting medications, initiating dialysis when necessary, and providing nutritional support.Fluid and Electrolyte ManagementFluid Monitoring: Regularly monitoring body weight, central venous pressure, and urine output helps detect fluid imbalances early. Patient intake and output are...
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Acute Kidney Injury IV: Diagnostic Studies and Prevention01:30

Acute Kidney Injury IV: Diagnostic Studies and Prevention

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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...
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Acute Kidney Injury VI: Nursing Management01:22

Acute Kidney Injury VI: Nursing Management

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Acute Kidney Injury (AKI) results in an inability to maintain fluid, electrolyte, and acid-base balance. Effective nursing management is critical in improving patient outcomes and includes comprehensive patient assessment and targeted interventions.Comprehensive Patient AssessmentA detailed history collection is essential, focusing on any recent infections, nephrotoxic medication use, or chronic conditions such as hypertension and diabetes that may contribute to AKI. During the physical...
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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.
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Continuous Renal Replacement Therapy, also known as CRRT, is a procedural treatment for acute kidney injury (AKI) that gradually removes uremic toxins and fluids while maintaining acid-base balance and stabilizing electrolytes. It is particularly useful for hemodynamically unstable patients. Unlike intermittent hemodialysis, which is faster, CRRT provides a gentler approach over 24 hours, closely mimicking the function of natural kidneys. However, CRRT is not ideal for patients with...
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Related Experiment Video

Updated: Sep 12, 2025

Evaluation of Hydration Status by Bioelectrical Impedance Vector Analysis in Patients with Ischemic Heart Disease Undergoing Exercise Stress Test
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BioImpedance Spectroscopy to maintain Renal Output: the BISTRO randomised controlled trial.

Simon J Davies1, David Coyle2, Elizabeth Lindley3

  • 1School of Medicine, Keele University, Keele, Staffordshire, UK.

Health Technology Assessment (Winchester, England)
|August 4, 2025
PubMed
Summary

A standardized clinical protocol for fluid management in dialysis effectively preserves residual kidney function and improves patient survival, making bioimpedance spectroscopy unnecessary for this purpose.

Keywords:
ANURIABLOOD PRESSURECLINICAL PROTOCOLSCOST-EFFECTIVENESS ANALYSISCOVID-19ETHNICITYGLOMERULAR FILTRATION RATEHEALTHCARE COSTSKIDNEYMULTICENTREPRACTICE PATTERNSQUALITY OF LIFEQUALITY-ADJUSTED LIFE-YEARSRANDOM ALLOCATIONRANDOMISED CONTROLLED TRIALRENAL DIALYSISRENAL INSUFFICIENCYRESIDUAL KIDNEY FUNCTIONSURVIVAL

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Related Experiment Videos

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Area of Science:

  • Nephrology
  • Medical Technology Assessment
  • Clinical Trials

Background:

  • Excessive fluid removal during dialysis can accelerate residual kidney function decline.
  • Optimizing fluid prescription is crucial for better patient outcomes.
  • Bioimpedance spectroscopy (BIS) is a tool to estimate tissue hydration and may aid fluid management.

Purpose of the Study:

  • To evaluate the efficacy and cost-effectiveness of using BIS to guide fluid removal in dialysis patients.
  • To determine if BIS can reduce the decline in residual kidney function and improve patient outcomes.

Main Methods:

  • A multicentre, randomized controlled trial involving incident haemodialysis patients.
  • Patients were randomized 1:1 to receive standard care or care guided by BIS.
  • Primary outcome was time to anuria; secondary outcomes included kidney function decline, blood pressure, and quality of life.

Main Results:

  • No significant difference in time to anuria between BIS-guided and standard care groups.
  • Kidney function decline was slower than anticipated in both groups.
  • BIS intervention showed a trend towards lower costs and improved quality-adjusted life-years, with no harm.

Conclusions:

  • A standardized clinical protocol for fluid assessment effectively preserves residual kidney function and improves medium-term survival.
  • Bioimpedance spectroscopy is not necessary to achieve these benefits.
  • The intervention demonstrated potential cost-effectiveness.