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Related Experiment Videos

[Reprocessing of capillary dialyzers].

E A Stetsiuk, I S Iarmolinskiĭ, V Iu Ponomareva

    Urologiia I Nefrologiia
    |January 1, 1989
    PubMed
    Summary

    Reprocessed cuprophan membranes lose their ability to cause acute dialysis leucopenia and bone-marrow irritation upon repeated use. Chemical reprocessing agents are not responsible for this change in biocompatibility.

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    Area of Science:

    • Biomaterials Science
    • Nephrology
    • Medical Device Reprocessing

    Background:

    • Cuprophan membranes are commonly used in hemodialysis.
    • The biocompatibility of cuprophan membranes can be affected by repeated use and reprocessing.
    • Acute dialysis-induced leucopenia and bone marrow irritation are known responses to first-time dialyzer use.

    Purpose of the Study:

    • To assess changes in cuprophan membrane biocompatibility after repeated reprocessing and use.
    • To identify the cause of altered biocompatibility in repeatedly used dialyzers.
    • To evaluate the suitability of reprocessed dialyzers for clinical application.

    Main Methods:

    • Biocompatibility testing of cuprophan membranes after multiple reprocessing cycles.
    • Assessment of acute dialysis-induced leucopenia and bone marrow irritation.
    • Chemical analysis of reprocessing agents (hydrogen peroxide, sodium hypochlorite, formaldehyde).
    • Measurement of effective capillary volume in repeatedly used dialyzers.

    Main Results:

    • Repeatedly used cuprophan membranes (second or third use) lost their ability to induce acute dialysis leucopenia.
    • Bone marrow irritation, characterized by juvenile neutrophil release, was absent in repeatedly used dialyzers.
    • The chemical reagents used in reprocessing did not cause the observed loss of leucopenia-inducing ability.
    • Capillary dialyzers showed no significant loss of effective capillary volume after three uses.

    Conclusions:

    • Reprocessing and repeated use significantly alter the biocompatibility of cuprophan membranes, reducing their capacity to elicit acute inflammatory responses.
    • The observed changes are not attributable to the chemical agents used in standard reprocessing protocols.
    • Visual and objective assessments are crucial for determining the suitability of dialyzers for repeated use.

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