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Related Experiment Videos

Retrievable IVC square stent filter: experimental study.

D Pavcnik1, B T Uchida, F S Keller

  • 1Dotter Interventional Institute, Oregon Health Sciences University, Portland 97201, USA.

Cardiovascular and Interventional Radiology
|June 26, 1999
PubMed
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The novel Square stent filter (SSF) demonstrates superior in vitro and in vivo emboli-trapping efficiency compared to the Greenfield filter. This retrievable IVC filter is easy to deploy, retrieve, and remains stable, showing promise for clinical use.

Area of Science:

  • Biomedical Engineering
  • Vascular Surgery
  • Medical Device Development

Background:

  • Inferior vena cava (IVC) filters are crucial for preventing pulmonary embolism.
  • Existing filters have limitations in trapping efficiency and retrievability.
  • Development of novel, effective IVC filters is an ongoing area of research.

Purpose of the Study:

  • To evaluate the in vitro and in vivo performance of a new, retrievable, home-made Inferior Vena Cava (IVC) Square Stent Filter (SSF).
  • To compare the emboli-trapping efficiency of the SSF against the stainless steel Greenfield Filter (SGF).
  • To assess the SSF's deployability, retrievability, stability, and IVC compatibility.

Main Methods:

  • In vitro comparison of SSF and SGF emboli-trapping efficiency using a flow model and standardized emboli.

Related Experiment Videos

  • In vivo assessment in swine for deployment, retrieval, stability, and self-centering of the SSF.
  • Long-term evaluation of SSF retrievability and IVC histology at 2 months.

    • Main Results:

    • The SSF demonstrated significantly higher overall emboli-trapping efficiency (91.7%) compared to the SGF (81%).
    • In vivo, the SSF showed easy deployment (100%), good central positioning (96.3%), and high retrieval success (95.5%).
    • The SSF exhibited 97.2% emboli-trapping efficiency in vivo with good stability, and minimal IVC reaction at 2 months.

    Conclusions:

    • The SSF is a promising IVC filter with high emboli-trapping efficiency.
    • The filter is easy to place and retrieve, and demonstrates good stability in vivo.
    • Further studies are warranted for potential clinical application of a commercially manufactured SSF.