MedicalResearch.com Interview with:
Eric T. Aaltonen MD, MPH
Assistant Professor, Department of Radiology
NYU Langone Medical Center
MedicalResearch.com: What is the background for this study? What are the main findings?
Dr. Aaltonen: A few years ago we started placing Denali inferior vena cava (IVC) filters and noticed that these filters tended to not tilt and were subsequently more straight forward to remove when patients returned for filter retrieval. Subsequently, a retrospective study was performed comparing these Denali filters with ALN and Option filters that have also been placed and removed at our hospitals. The results demonstrate that Option filters have an increased rate of tilt at retrieval and increased retrieval time compared to Denali filters. No significant difference in tilt or retrieval time was found with ALN filters. Additionally, the presence of tilt correlates with more equipment use and increased fluoroscopy time during retrieval.
MedicalResearch.com: What should clinicians and patients take away from your report?
Dr. Aaltonen: Several brands of filters are commercially available and while this retrospective study demonstrates a difference in ease of retrieval between two of the three filter types analyzed, several other factors must be considered when discussing IVC filters. These factors include appropriate indications for caval filtration, temporary versus permanent filtration, improved retrieval rates when filters are no longer indicated, and the long-term safety of retrievable filters that are lost to follow-up.
MedicalResearch.com: What recommendations do you have for future research as a result of this study?
Dr. Aaltonen: For our cohort, no difference was identified for ALN filters when compared to both Denali and Option filters, likely due to small sample size which precludes the power to detect subtle differences. Therefore, future research needs to include larger retrieval groups and additional filter brands, something that could be accomplished via more extensive multicenter analysis. As important, long term safety profiles of retrievable filters also need to be further evaluated, especially for relatively newer filter brands.
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2016 Society of Interventional Radiology Meeting abstract:
Inferior Vena Cava Filter Retrieval: A Retrospective Multicenter Experience with Three Nonpermanent Filter Types
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Eric Aaltonen MD, MPH (2016). Retrospective Study Compares Removal of Three Nonpermanent IVC Filter Types MedicalResearch.com