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Dialysis membranes and coagulation system.

M Notohamiprodjo, K Andrassy, J Bommer

    Blood Purification
    |January 1, 1986
    PubMed
    Summary
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    Dialysis membranes activate blood clotting through platelet activation, forming a protein layer. Polycarbonate membranes showed no improvement in reducing blood clot formation compared to cuprophane membranes.

    Area of Science:

    • Biomaterials Science
    • Hematology
    • Nephrology

    Background:

    • Artificial hemodialysis membranes exhibit variable thrombogenicity compared to natural endothelial cells.
    • Thrombocyte (platelet) activation, following protein layer formation, is critical for coagulation system activation by dialysis membranes.
    • The precise role of the protein membrane's quality in determining thrombocyte activation remains unclear.

    Purpose of the Study:

    • To investigate the thrombogenicity of artificial hemodialysis membranes.
    • To compare the performance of polycarbonate membranes against cuprophane membranes regarding thrombogenicity.

    Main Methods:

    • Evaluating the formation of a protein layer on artificial membranes.
    • Assessing thrombocyte activation and coagulation system markers (e.g., fibrinopeptide A).

    Related Experiment Videos

  • Comparing platelet extraction and release reactions with different membrane materials.

    • Main Results:

    • Dialysis membranes activate the intrinsic coagulation pathway and lead to local thrombin action.
    • Polycarbonate membranes did not demonstrate superior performance over cuprophane membranes in terms of thrombogenicity.
    • Evidence suggests multiple mechanisms, beyond thrombin, may contribute to blood cell activation.

    Conclusions:

    • Artificial dialysis membranes possess inherent thrombogenicity due to protein layer formation and platelet activation.
    • Polycarbonate membranes offer no significant advantage over cuprophane membranes in mitigating thrombogenicity.
    • Further research is needed to fully elucidate the mechanisms of membrane-induced coagulation activation.