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A new percutaneous vena cava filter.

A Cragg, G Lund, E Salomonowitz

    AJR. American Journal of Roentgenology
    |September 1, 1983
    PubMed
    Summary
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    A novel percutaneous vena cava filter using nitinol wire was successfully tested in dogs. This new implant demonstrated long-term patency and effective clot capture, offering a potential alternative to existing devices.

    Area of Science:

    • Biomedical Engineering
    • Vascular Surgery
    • Materials Science

    Background:

    • Inferior vena cava filters are crucial for preventing pulmonary embolism.
    • Current filters have limitations requiring improved designs.
    • Percutaneous delivery systems offer less invasive implantation options.

    Purpose of the Study:

    • To develop and evaluate a new percutaneous vena cava filter.
    • To assess the filter's long-term patency and efficacy in clot capture.
    • To determine if the new design is a viable alternative to existing filters.

    Main Methods:

    • A novel filter constructed from nitinol wire (0.045 cm diameter) was designed.
    • The filter was delivered percutaneously via an 8 French Teflon catheter into the inferior vena cava of 11 dogs.

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  • The filter's performance was assessed after warming to body temperature and remained in situ for up to 6 weeks.

    • Main Results:

    • The nitinol filter successfully resumed its spiral shape upon reaching body temperature.
    • Long-term patency of the inferior vena cava was maintained.
    • The filter effectively captured injected radiopaque clots, demonstrating its trapping capability.

    Conclusions:

    • The newly developed percutaneous vena cava filter shows promise as a safe and effective device.
    • The nitinol-based design offers a simple and potentially advantageous alternative to current vena cava filters.
    • Further studies are warranted to validate its clinical applicability in humans.