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Related Experiment Videos

Cellulose-based haemodialysis membranes: biocompatibility and functional performance compared.

C Woffindin1, N A Hoenich, J N Matthews

  • 1Department of Medicine, School of Clinical Medical Sciences, Newcastle upon Tyne, UK.

Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association
|January 1, 1992
PubMed
Summary

Altering hydroxyl (OH) groups on regenerated cellulose membranes for renal failure treatment did not show a clear link to improved biocompatibility. Not all OH groups appear to influence biocompatibility equally.

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Area of Science:

  • Biomaterials Science
  • Nephrology
  • Polymer Chemistry

Background:

  • Regenerated cellulose membranes are crucial for renal failure treatment.
  • Surface hydroxyl (OH) groups on these membranes influence complement activation and thrombogenicity.
  • Manufacturing process modifications can mask or reduce OH groups.

Purpose of the Study:

  • To investigate the role of hydroxyl group modification on cellulose-based membranes.
  • To assess the impact of varying degrees of OH group replacement on membrane functional performance and biocompatibility.
  • To evaluate biocompatibility markers including neutropenia, leukocyte activation, anaphylatoxin generation, and hypoxemia.

Main Methods:

  • A clinical study involving four cellulose-based membranes: Cuprophan, Hemophan, cellulose acetate, and cellulose triacetate.

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  • Systematic replacement of membrane hydroxyl groups, ranging from <1% to >80%.
  • Assessment of biocompatibility parameters in patients undergoing renal failure treatment.

    • Main Results:

    • No straightforward correlation was observed between the percentage of hydroxyl groups replaced and modifications in biocompatibility.
    • The study suggests that different hydroxyl groups may have varying impacts on membrane biocompatibility.
    • Biocompatibility outcomes like neutropenia, leukocyte activation, and anaphylatoxin generation were monitored.

    Conclusions:

    • The extent of hydroxyl group replacement does not directly predict improved biocompatibility of regenerated cellulose membranes.
    • Further research is needed to understand the specific roles of different hydroxyl groups in membrane-device interactions.
    • Optimizing cellulose membrane design for renal failure therapy requires a nuanced approach beyond simply reducing OH groups.