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Related Experiment Videos

A vena cava filter using thermal shape memory alloy. Experimental aspects

M Simon, R Kaplow, E Salzman

    Radiology
    |October 1, 1977
    PubMed
    Summary
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    A novel nitinol device offers a safer, simpler, and faster alternative to surgical vena cava ligation for preventing pulmonary embolism. This innovative filter permanently traps blood clots from the lower body.

    Area of Science:

    • Cardiovascular Surgery
    • Biomedical Engineering
    • Interventional Radiology

    Background:

    • Surgical ligation of the vena cava is a traditional method for treating pulmonary embolism.
    • This surgical approach is increasingly being replaced by less invasive, device-based interventions.
    • Existing devices are introduced via peripheral veins, offering improved safety and efficacy.

    Purpose of the Study:

    • To introduce a new experimental device for preventing thromboemboli.
    • To evaluate the safety, simplicity, and speed of this novel device.
    • To assess the potential of nitinol-based filters in managing pulmonary embolism.

    Main Methods:

    • Development of an experimental device using nitinol, a metal alloy with unique memory properties.

    Related Experiment Videos

  • Insertion of the device as a straight, thin wire through a small-bore catheter.
  • Deployment of the device within the inferior vena cava, where it assumes a complex filter shape upon sensing body temperature.

    • Main Results:

    • The nitinol device demonstrated a self-locking mechanism, permanently securing its position in the inferior vena cava.
    • The device is designed to trap further thromboemboli originating from the pelvis or lower limbs.
    • The introduction method is noted for its safety, simplicity, and speed.

    Conclusions:

    • The experimental nitinol vena cava filter represents a significant advancement in preventing pulmonary embolism.
    • This device offers a promising alternative to surgical ligation and current inferior vena cava filters.
    • Further clinical evaluation is warranted to confirm the long-term efficacy and safety of this innovative technology.