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Related Experiment Videos

Polyester arterial prostheses. Recent developments from the Czech Republic and Poland

R Guidoin1, M King, Y Marois

  • 1Department of Surgery, Laval University, Quebec, Canada.

ASAIO Journal (American Society for Artificial Internal Organs : 1992)
|January 1, 1997
PubMed
Summary
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Eastern European polyester vascular prostheses show promise with warp knitting technology. However, surface contaminants and crimping issues require improvement for competitive performance against western grafts.

Area of Science:

  • Biomaterials Science
  • Vascular Surgery
  • Textile Engineering

Background:

  • Polyester vascular prostheses are crucial in treating vascular diseases.
  • Eastern European manufacturers are developing new prototype grafts.
  • Evaluation of these new designs against established western products is needed.

Purpose of the Study:

  • To assess the physical and chemical properties of new Eastern European polyester vascular prostheses.
  • To compare the in vitro and in vivo performance of these prototypes with commercial western grafts.
  • To identify areas for improvement in the design and production of these devices.

Main Methods:

  • In vitro physical and chemical testing of four prototype prostheses (Ra-1n, Ra-1v, Mikrofroté, Dallon).
  • Comparison with three commercial western prostheses (Triaxial, Vasculour II, Cooley II).

Related Experiment Videos

  • In vivo study involving implantation in dogs for up to 6 months, followed by histological and structural analysis.

    • Main Results:

    • Weft knitted structures (Mikrofroté) demonstrated poor long-term dimensional stability in vivo.
    • Warp knitted structures in prototypes showed better dimensional stability.
    • All four prototypes exhibited inflammatory reactions and delayed healing due to surface contaminants.
    • High surface carbon-oxygen ratios indicated issues with the crimping process.

    Conclusions:

    • Warp knitting technology is a promising development for polyester vascular prostheses.
    • Improvements in cleaning, packaging, and crimping processes are essential for Eastern European prostheses.
    • Further evaluation of warp knitted structures is warranted as the technology gains global traction.