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Related Concept Videos

Hemodialysis I: Introduction01:25

Hemodialysis I: Introduction

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Hemodialysis (HD) is a medical treatment that artificially removes waste products, excess fluids, and toxins from the blood when the kidneys are no longer able to perform these functions effectively. In this process, blood is filtered through a semipermeable membrane, allowing for the selective removal of waste while preserving necessary components like blood cells and proteins. Hemodialysis is typically performed in patients with end-stage renal disease (ESRD) or severe kidney...
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Hemodialysis II: Procedure and Complications01:24

Hemodialysis II: Procedure and Complications

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DialyzersA hemodialysis (HD) dialyzer is a plastic cartridge containing thousands of parallel hollow fibers, which serve as semipermeable membranes. These fibers are typically made from cellulose-based or other synthetic materials. During HD, blood is pumped into the top of the cartridge and distributed among these fibers. Simultaneously, dialysis fluid, known as dialysate, is introduced into the bottom of the cartridge, bathing the outside of the fibers. Across the semipermeable membrane,...
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Dialysis01:15

Dialysis

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Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...
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Filtration and Urine Formation01:32

Filtration and Urine Formation

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The function of the kidneys is to filter, reabsorb, secrete, and excrete. Every day the kidneys filter nearly 180 liters of blood, initially removing water and solutes but ultimately returning nearly all filtrates into circulation with the help of osmoregulatory hormones. This process removes wastes and toxins but is also crucial to maintain water and electrolyte levels. Most of these functions are performed by the tiny but numerous nephrons contained within the kidneys.
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Continuous Renal Replacement Therapy01:30

Continuous Renal Replacement Therapy

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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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Glomerular Filtration01:15

Glomerular Filtration

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The filtration membrane in the renal system is a highly specialized structure essential for filtering blood. It consists of glomerular capillaries and podocytes, forming a selective barrier that permits the passage of water and small solutes while restricting most plasma proteins and blood cells.
Components of the Filtration Membrane
The filtration process involves three key layers: the glomerular endothelial cells, the basement membrane, and the podocyte-formed filtration slits.
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A Modified EPA Method 1623 that Uses Tangential Flow Hollow-fiber Ultrafiltration and Heat Dissociation Steps to Detect Waterborne Cryptosporidium and Giardia spp.
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Hemodiafiltration in developing countries.

Prit Kusirisin1,2,3,4, Nattachai Srisawat1,2,3,5

  • 1Division of Nephrology, Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.

Seminars in Dialysis
|March 30, 2022
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Summary
This summary is machine-generated.

Hemodiafiltration (HDF) offers enhanced benefits over hemodialysis for kidney disease patients. Adoption in developing nations faces barriers, but innovations may improve access and outcomes.

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Area of Science:

  • Nephrology
  • Renal Replacement Therapy

Background:

  • Hemodiafiltration (HDF) combines convection and diffusion for superior uremic toxin clearance compared to hemodialysis.
  • Growing evidence supports HDF benefits, including hemodynamic stability, improved nutrition, anemia control, and reduced inflammation, impacting long-term survival and cardiovascular health.

Purpose of the Study:

  • To explore the practice and adoption barriers of Hemodiafiltration (HDF) in developing countries.
  • To provide guidance for implementing HDF in resource-limited settings.

Main Methods:

  • Review of current Hemodiafiltration (HDF) practices and challenges in developing nations.
  • Analysis of innovations developed to overcome cost and machine availability limitations.

Main Results:

  • Limited data exists on HDF prevalence in developing countries due to registry shortages.
  • High costs, limited machine availability, and reimbursement issues hinder HDF adoption.
  • Innovations like convective control HDF (CC-HDF) and simplified dilution methods show promise for effective HDF delivery.

Conclusions:

  • Despite significant barriers, innovative approaches are emerging to facilitate Hemodiafiltration (HDF) in resource-limited settings.
  • Clinical practice recommendations are needed to guide HDF implementation in developing countries.