Characteristics of Option and Denali Inferior Vena Cava Filters

Area of Science:

• Vascular surgery
• Medical device engineering
• Radiology

Background:

• Inferior Vena Cava (IVC) filters are crucial for preventing pulmonary embolism.
• Option and Denali filters are commonly used IVC filters with distinct designs.
• Understanding their performance characteristics is vital for clinical decision-making.

Purpose of the Study:

• To compare the placement and retrieval characteristics of Option and Denali IVC filters.
• To identify associations between filter characteristics and patient anatomy.
• To evaluate the incidence of filter tilt, tilt angle changes, and IVC constriction.

Main Methods:

• Retrospective study of 119 patients undergoing filter placement between August 2019 and August 2022.
• Inclusion of patients who received either Option or Denali filters.
• Analysis of filter tilt, tilt angle changes, retrieval success, IVC contraction, and fluoroscopy time.

Main Results:

• Option filters showed significantly higher tilt incidence (76.7%) and tilt angle change post-placement (74.1%) compared to Denali filters (11.9% and 8.3%, respectively).
• Option filter tilt at placement correlated with the common iliac vein-inferior vena cava (CIV-IVC) angle.
• Denali filters demonstrated a higher IVC contraction rate (87.5%) post-retrieval than Option filters (22.2%).
• Option filter retrieval required longer median fluoroscopy times, associated with tilt angle during retrieval.

Conclusions:

• Option filters exhibit greater propensity for tilt at placement and post-placement angle changes.
• The tilt angle of Option filters is influenced by the CIV-IVC angle.
• Option filter retrieval is associated with increased fluoroscopy time due to tilt.
• Denali filters are more likely to cause IVC constriction after placement.