Optional vena cava filter with disengaging centering struts: retrieval in an animal model

Area of Science:

• Biomedical Engineering
• Vascular Surgery
• Medical Device Development

Background:

• Optional inferior vena cava (IVC) filters are used to prevent pulmonary embolism.
• Current IVC filters can present challenges with long-term retrieval, tilting, and migration.
• Novel filter designs are needed to improve safety and efficacy.

Purpose of the Study:

• To evaluate the safety and long-term retrievability of a novel optional IVC filter prototype.
• To assess the feasibility of a disengageable strut design for improved retrieval.
• To investigate potential complications such as filter tilt, migration, and IVC damage in an animal model.

Main Methods:

• An optional IVC filter prototype with disengageable centering struts was implanted in an animal model.
• Filter retrieval was performed up to 27 weeks post-implantation.
• Post-retrieval analysis focused on filter tilt, migration, and IVC integrity.

Main Results:

• Successful retrieval of six filters from three animals was achieved up to 27 weeks.
• No substantial filter tilt or migration was observed.
• No significant IVC damage was detected, indicating good biocompatibility.

Conclusions:

• The evaluated IVC filter prototype demonstrates promising safety and long-term retrievability.
• The disengageable strut design may overcome limitations of existing optional IVC filters.
• Further studies are warranted to confirm clinical applicability and long-term performance.