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Related Experiment Videos

Experience with the Amplatz retrievable vena cava filter.

D H Epstein1, M D Darcy, D W Hunter

  • 1Department of Radiology, University of Minnesota Hospital and Clinic, Minneapolis 55455.

Radiology
|July 1, 1989
PubMed
Summary

The Amplatz retrievable inferior vena cava filter showed a 17.5% rate of caval thrombosis. While no deaths occurred, its role in treating deep venous thrombosis and pulmonary emboli remains unclear.

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Area of Science:

  • Vascular Surgery
  • Interventional Radiology
  • Medical Device Evaluation

Background:

  • The Amplatz retrievable inferior vena cava filter is designed for permanent or temporary use.
  • Percutaneous retrieval is a key feature of this device.

Purpose of the Study:

  • To evaluate the safety and efficacy of the Amplatz retrievable inferior vena cava filter.
  • To assess the incidence of complications, including caval thrombosis and pulmonary emboli.

Main Methods:

  • 52 Amplatz filters were placed in 52 patients.
  • Follow-up included cavography, CT, ultrasound, and autopsy in 81% of patients.
  • Filter retrieval or repositioning was attempted percutaneously.

Main Results:

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  • No deaths were associated with filter placement or use.
  • Inferior vena cava thrombosis occurred in 17.5% of previously nonobstructed vena cavae.
  • Six filters were successfully retrieved or repositioned; no clinically evident pulmonary emboli were noted post-placement.

Conclusions:

  • The high rate of caval thrombosis may relate to filter trapping efficiency or geometry.
  • The clinical utility of the Amplatz filter for deep venous thrombosis and pulmonary embolism requires further investigation.