Characteristics of Option and Denali Inferior Vena Cava Filters

Objective To assess the characteristics of Option and Denali filters and to identify associations between these characteristics in each filter type. Methods Consecutive patients who underwent Option or Denali filter placement between August 2019 and August 2022 were included in this retrospective study. Results A total of 119 patients (Option, n = 60; Denali, n = 59) were included. The retrieval rates were 45.0% for Option filters and 40.7% for Denali filters. The incidence of tilt at placement was higher for Option filters (76.7%) than for Denali filters (11.9%; P < 0.001). The tilt angle of Option filters at placement was correlated with the common iliac vein-inferior vena cava (CIV-IVC) angle. The incidence of tilt angle change after placement was higher for Option filters (74.1%) than for Denali filters (8.3%; P = 0.001). The IVC contraction rate after retrieval of Option is less than Denali (22.2% vs. 87.5%, P<0.001). The median fluoroscopy time during Option filter retrieval was longer than during Denali filter retrieval. The fluoroscopic time was related to tilt angle during retrieval of Option filters. Conclusion Option filters are more likely than Denali filters to tilt at placement, and the tilt angle of Option filters is more prone to change after placement. The tilt angle at placement in Option filters is related to the CIV-IVC angle. Option filters require a longer fluoroscopic time during retrieval than Denali filters, and this increased fluoroscopic time is related to the tilt angle. Denali is more likely to cause IVC constriction after placement.