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Related Experiment Videos

Agarose-encapsulated adsorbents.

C J Holloway, K Harstick, G Brunner

    The International Journal of Artificial Organs
    |March 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Encapsulating ion-exchange and adsorbent resins in agarose beads improves hemocompatibility. This method protects blood cells from direct contact with resins, enhancing safety for hemoperfusion applications.

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    Area of Science:

    • Biomaterials Science
    • Chemical Engineering
    • Medical Device Technology

    Background:

    • Ion-exchange and adsorbent resins are used in hemoperfusion but can cause adverse reactions.
    • Native resins have particle sizes of 0.2-1.0 mm, posing risks to blood components.
    • Improving the hemocompatibility of adsorbent materials is crucial for patient safety.

    Purpose of the Study:

    • To develop a method for encapsulating ion-exchange and adsorbent resins into agarose spheres.
    • To assess the diffusion properties of the agarose coating for plasma components and blood cells.
    • To evaluate the hemocompatibility of the encapsulated resins compared to native resins.

    Main Methods:

    • Encapsulation of native resins (0.2-1.0 mm particle diameter) into agarose spheres (5-10 mm diameter).

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  • Assessment of plasma component diffusion and blood corpuscle access to encapsulated resins.
  • Quantification of resin loading capacity within agarose beads (up to 0.3 g resin/g agarose).
  • Evaluation of hemocompatibility of the agarose coating.

    • Main Results:

    • Agarose encapsulation allows rapid diffusion of plasma components while restricting blood corpuscle access.
    • Effective surface area reduction for erythrocytes, thrombocytes, and leucocytes by a factor of 5-20.
    • High resin loading capacity achieved, with at least 0.3 g of resin per gram of agarose.
    • The agarose coating demonstrates significantly improved hemocompatibility compared to native resins.

    Conclusions:

    • Agarose encapsulation is an effective method for preparing biocompatible ion-exchange and adsorbent resins.
    • This technique enhances hemocompatibility by preventing direct contact between blood cells and resins.
    • The method is suitable for various adsorbent materials, including powdered active charcoal and resins.