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In patients with renal disease, dosage adjustments are necessary to maintain therapeutic plasma drug concentrations and prevent toxicity or subtherapeutic exposure. Renal impairment alters drug pharmacokinetics, especially in conditions like uremia, where changes such as prolonged elimination half-life and altered apparent volume of distribution can significantly affect drug disposition. These changes require careful modification of the dosing regimen to achieve the desired clinical...
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Continuous Renal Replacement Therapy (CRRT) is an essential intervention for patients experiencing severe kidney dysfunction. This therapy offers a continuous mechanism for removing fluids and toxins from the bloodstream, leveraging the patient’s blood pressure to facilitate filtration through a specialized filter. This method contrasts with intermittent dialysis, providing a gentler and more consistent removal of waste products and excess fluid, which is particularly beneficial in...
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Glomerular filtration rate (GFR) can be estimated from serum creatinine using the modification of diet in renal disease (MDRD) formula or the chronic kidney disease–epidemiology collaboration (CKD–EPI) equation. Both methods are widely used in clinical practice to assess kidney function and guide treatment decisions.The MDRD equation does not require weight or height measurements and is normalized to the body surface area of 1.73 m², considered the average adult surface area.
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Continuous Renal Replacement Therapy01:30

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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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Methods for dose quantification in continuous renal replacement therapy: Toward a more precise approach.

Gianluca Villa1,2, Sergio Fabbri1, Sara Samoni3

  • 1Department of Health Sciences, Section of Anaesthesiology, Intensive Care and Pain Medicine, University of Florence, Florence, Italy.

Artificial Organs
|May 5, 2021
PubMed
Summary
This summary is machine-generated.

Accurate dose assessment in continuous renal replacement therapy (CRRT) for acute kidney injury (AKI) is crucial. This review highlights limitations in current methods and proposes solutions for precise CRRT dose quantification.

Keywords:
clearancedialysancenomenclaturesieving coefficienturea

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Area of Science:

  • Nephrology
  • Critical Care Medicine
  • Biomedical Engineering

Background:

  • Periodic dose assessment is vital for optimizing continuous renal replacement therapy (CRRT) in critically ill acute kidney injury (AKI) patients.
  • Flows-based methods are common for bedside CRRT dose estimation but can overestimate the delivered dose.
  • Urea clearance offers a more precise measure of CRRT efficacy but has its own limitations.

Purpose of the Study:

  • To outline the standard practices for CRRT dose quantification in intensive care units.
  • To identify pitfalls associated with current CRRT dose assessment methods.
  • To propose solutions for achieving more precise CRRT dose measurements.

Main Methods:

  • Review of current clinical practices for CRRT dose quantification.
  • Analysis of limitations in flows-based and urea-based dose estimation methods.
  • Discussion of potential improvements including marker solute selection, sampling, calculations, and quality control.

Main Results:

  • Flows-based CRRT dose estimation often overestimates the actual delivered dose compared to urea clearance.
  • While urea clearance is more precise, limitations exist in its measurement and application.
  • Current methods require refinement to improve the accuracy of CRRT dose quantification.

Conclusions:

  • Precise CRRT dose quantification is essential for effective treatment of AKI in critically ill patients.
  • Addressing limitations in marker solute choice, sampling, calculations, and quality control can enhance accuracy.
  • Optimized dose assessment strategies are needed to improve CRRT efficacy and patient outcomes.