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Related Experiment Videos

Adjustable temporary venous spring filter: in vitro assessment

J Hosaka1, S Roy, K Kvernebo

  • 1Section for Experimental Radiology, National Hospital, Oslo, Norway.

Academic Radiology
|July 1, 1997
PubMed
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A novel temporary venous spring filter effectively traps blood clots in various vessel sizes, demonstrating high efficiency in an in vitro study. This simple device shows significant potential for clinical application in preventing embolic events.

Area of Science:

  • Vascular surgery
  • Medical device engineering
  • Biomedical research

Background:

  • Venous thromboembolism poses a significant clinical challenge.
  • Temporary filters are crucial for preventing embolic events.
  • Existing filters may have limitations in accommodating diverse vessel diameters.

Purpose of the Study:

  • To evaluate the efficacy of a novel temporary venous spring filter.
  • To assess the filter's ability to adapt to varying vessel diameters.
  • To determine the clot-trapping capability of the spring filter.

Main Methods:

  • In vitro study using polyethylene tubes and porcine inferior vena cava.
  • Testing filters in vessel models with diameters ranging from 10.0-16.0 mm.
  • Assessing clot-trapping ability using simulated blood flow and various clot sizes.

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Main Results:

  • Increased luminal extension significantly improved clot-trapping rates (61.1%-87.5% in tubes, 15.8%-77.5% in venous specimens).
  • Over 90% clot trapping was achieved at 3.0r luminal extension across all models.
  • Mean intraluminal pressure elevation varied with clot size, with larger clots causing a 17.0 cm saline increase.

Conclusions:

  • The simple-design spring filter demonstrated high efficiency in trapping clots.
  • The filter's adaptability to different vessel diameters is a key advantage.
  • This device shows promise as an effective embolic protection tool.