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Related Experiment Videos

Hylan gel composition for percutaneous embolization.

N E Larsen1, E A Leshchiner, E G Parent

  • 1Department of Chemistry, Matrix Biology Institute, Ridgefield, New Jersey.

Journal of Biomedical Materials Research
|June 1, 1991
PubMed
Summary

A new injectable hylan gel effectively creates long-lasting arterial blockages for embolization. Animal studies show complete occlusion without complications, using a gel that integrates with inflammatory cells and scar tissue over time.

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Area of Science:

  • Biomaterials Science
  • Vascular Surgery
  • Interventional Radiology

Background:

  • Embolization is a critical procedure in interventional radiology and vascular surgery.
  • Existing embolic agents may have limitations, necessitating the development of improved materials.
  • Hylan-based hydrogels offer potential for controlled delivery and biocompatibility.

Purpose of the Study:

  • To develop and evaluate a novel viscoelastic, pseudoplastic, and radiopaque injectable hylan gel for percutaneous embolization.
  • To assess the in vitro and in vivo efficacy and safety of the hylan gel as an embolic agent.

Main Methods:

  • The embolization gel was formulated using cross-linked hylan, tantalum, microcrystalline cellulose, hexamethonium chloride, and thrombin.
  • In vitro and in vivo studies were conducted, including delivery via small-lumen catheters in animal models (rat aorta, rabbit auricular artery).

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  • Histopathological analysis was performed to evaluate the occlusion mechanism and tissue response over time.

    • Main Results:

    • The injectable hylan gel successfully induced the formation of a solid blood/gel coagulum upon delivery.
    • Complete and long-lasting arterial blockage was achieved in animal studies without significant complications.
    • Microscopic evaluation revealed initial occlusion by gel and fibrin, progressing to occlusion by gel, inflammatory cells, and fibrosis by 7 weeks.

    Conclusions:

    • The developed hylan gel is a safe and effective injectable agent for percutaneous embolization.
    • The gel demonstrates excellent performance in achieving durable arterial occlusion with minimal adverse events.
    • This novel biomaterial shows promise for clinical applications in vascular interventions.