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Membranes for dialysis: can we do without them?

N A Hoenich1

  • 1School of Clinical Medical Sciences, Newcastle University, Newcastle-upon-Tyne, United Kingdom. nicholas.hoenich@ncl.ac.uk

The International Journal of Artificial Organs
|December 11, 2007
PubMed
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Dialysis membranes have evolved over 50 years, moving from cellulose to advanced synthetic polymers for better biocompatibility and molecule removal. Current membranes still face limitations in selectivity and bioreactivity, prompting research into novel solutions.

Area of Science:

  • Biomaterials Science
  • Nephrology
  • Chemical Engineering

Background:

  • Membranes for chronic kidney disease treatment have evolved significantly over five decades.
  • Initial cellulose membranes have been replaced by modified cellulose and synthetic polymer membranes for improved biocompatibility.

Purpose of the Study:

  • To review the evolution of dialysis membranes, focusing on improvements in biocompatibility and solute removal.
  • To discuss the limitations of current membranes and explore alternative solute transport approaches.

Main Methods:

  • Review of historical and current literature on dialysis membrane technology.
  • Analysis of membrane properties including pore size, distribution, and biocompatibility.
  • Discussion of emerging trends in membrane design and non-membrane solute transport.

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Main Results:

  • Modern membranes offer enhanced biocompatibility and optimized pore characteristics for more effective removal of uremic toxins.
  • Despite advances, current membranes exhibit non-selectivity, residual bioreactivity, and variable adsorption of endotoxins.
  • Limitations necessitate exploration beyond traditional membrane filtration.

Conclusions:

  • Dialysis membrane technology has advanced considerably, but limitations in selectivity and bioreactivity persist.
  • Future directions include developing membranes with incorporated biological functions and investigating membrane-less solute transport systems.