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Leukopenia, hypoxia, and complement function with different hemodialysis membranes

A I Jacob, G Gavellas, R Zarco

    Kidney International
    |October 1, 1980
    PubMed
    Summary
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    Hemodialysis membrane type significantly impacts leukopenia but does not cause hypoxia. Complement activation during dialysis does not deplete functional components, indicating no clinical significance.

    Area of Science:

    • Nephrology
    • Immunology
    • Biomedical Engineering

    Background:

    • Complement activation by cuprophan membranes in hemodialysis is linked to leukopenia and hypoxia.
    • The relationship between leukopenia, hypoxia, and complement activation requires further investigation.

    Purpose of the Study:

    • To determine if hypoxia in hemodialysis patients is related to leukopenia.
    • To assess if complement activation leads to a depletion of functional complement components.

    Main Methods:

    • Sequential hemodialysis of four patients using four different membrane types: cuprophan, regenerated cellulose, cellulose acetate, and polyacrilonitrile.
    • Monitoring of white blood cell counts, platelet counts, and arterial oxygen partial pressure (PO2) throughout dialysis.
    • Assessing functional hemolytic titers of complement components (C3, C4, C5) before and after dialysis.

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    Main Results:

    • All membranes induced significant leukopenia, varying in severity and duration, with a rebound leukocytosis observed for most.
    • Despite varying leukopenia, all membranes caused similar, progressive hypoxia during dialysis.
    • Functional complement component titers remained unchanged, indicating no complement depletion.

    Conclusions:

    • Hemodialysis-induced leukopenia is membrane-dependent and not the cause of associated hypoxia.
    • Complement activation during hemodialysis does not result in functional complement depletion and lacks clinical significance.