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Deployment problems with the titanium Greenfield filter

T J Sweeney1, M E Van Aman

  • 1Division of Cardiovascular and Interventional Radiology, Ohio State University Hospital, Columbus.

Journal of Vascular and Interventional Radiology : JVIR
|September 1, 1993
PubMed
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The modified hook titanium Greenfield filter showed promising initial results in preventing pulmonary embolism. Further investigation into its deployment mechanism is recommended for optimal performance.

Area of Science:

  • Vascular Surgery
  • Interventional Radiology
  • Medical Device Technology

Background:

  • Inferior vena cava filters (IVCFs) are crucial for preventing pulmonary embolism.
  • The modified hook titanium Greenfield filter represents a novel approach to IVCF deployment.
  • Evaluating the initial clinical experience with this new device is essential.

Purpose of the Study:

  • To assess the initial experience and safety of deploying the modified hook titanium Greenfield filter.
  • To evaluate the filter's positioning, leg distribution, and potential complications.
  • To determine the early clinical outcomes associated with this IVCF.

Main Methods:

  • Retrospective review of 23 patients undergoing filter placement over one year.
  • Immediate post-placement radiographs to confirm filter position.

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  • Follow-up imaging in 15 patients (65%) to assess long-term outcomes.

    • Main Results:

    • Twenty-four filters were successfully placed in 23 patients.
    • Filter tilting (>15 degrees) occurred in 23% of cases without complications.
    • Poor leg distribution was observed in 71% of placements, with limited success in corrective manipulation.
    • Follow-up revealed three cases of asymptomatic inferior vena caval thrombosis and one recurrent pulmonary embolism.

    Conclusions:

    • No immediate adverse events directly attributed to filter placement were observed.
    • The modified hook titanium Greenfield filter demonstrated a degree of safety in initial use.
    • Further research into the filter's deployment mechanism is warranted to optimize performance and leg distribution.