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Related Experiment Videos

Experimental study of bioactive polyurethane sponge as an artificial trachea

M Yanagi1, A Kishida, T Shimotakahara

  • 1First Department of Surgery, Faculty of Medicine, Kagoshima University, Japan.

ASAIO Journal (American Society for Artificial Internal Organs : 1992)
|July 1, 1994
PubMed
Summary

Researchers developed an artificial trachea using polyurethane sponge (PS) with enhanced surface properties. Fibronectin and apatite coatings improved tissue regeneration in tracheal defect models, showing promise for reconstructive surgery.

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Tissue Engineering

Background:

  • Biologic trachea reconstruction presents challenges due to the need for elasticity and tissue integration.
  • Polyurethane sponge (PS) offers a potential scaffold for artificial trachea development.
  • Surface modification is crucial for enhancing biocompatibility and tissue response.

Purpose of the Study:

  • To fabricate and evaluate an artificial trachea using modified polyurethane sponge (PS).
  • To assess the impact of surface modifications (collagen, fibronectin, RGD peptide, apatite) and pore size on tissue integration.
  • To investigate the efficacy of PS tracheal grafts in animal models.

Main Methods:

  • Fabrication of PS scaffolds with two pore sizes (small: 150-350 microns, large: 350-710 microns).

Related Experiment Videos

  • Surface modification of PS with collagen, fibronectin, RGD peptide, and apatite.
  • Subcutaneous implantation in rats to evaluate inflammatory response and fibroblast infiltration.
  • Patching of partial tracheal defects in rats.
  • Tracheal transplantation in dogs to assess graft integration and healing.

    • Main Results:

    • Surface treatments, particularly collagen and collagen coating, induced severe inflammatory cell infiltration in rats.
    • Fibronectin promoted fibroblast infiltration and maturity within the PS scaffolds.
    • Small pore size PS exhibited greater inflammatory cell and fibroblast infiltration compared to large pore size.
    • Patches with fibronectin and apatite showed improved epithelization in tracheal defects.
    • Canine tracheal transplantation demonstrated no anastomosis separation and tissue reconstruction, but sputum absorption and granulation occurred.

    Conclusions:

    • Polyurethane sponge (PS) modified with fibronectin and apatite shows potential for tracheal tissue regeneration.
    • Surface properties and pore size significantly influence the host response and tissue integration.
    • While promising, further optimization is needed to address issues like sputum absorption and granulation for clinical application.