Morrow KL, et al. - Researchers performed an Institutional Review Board-approved retrospective chart review of patients undergoing inferior vena cava (IVC) filter retrieval attempts in the Department of Vascular Surgery at The Cleveland Clinic from 2011 to 2018 to determine the factors associated with failure of retrieval of IVC filters. Two hundred ninety-five filter retrieval attempts were made in 294 patients with no procedural IVC ruptures, morbidity, or mortality. Given the procedural safety, they recommend performing retrieval attempts for all IVC filters irrespective of chronicity and complexity. Tine penetration is nearly ubiquitous, but predictors of retrieval failure comprised IVC filters with hook-apex (HA) or hook-apex and collar (HA+C) embedded into or penetrating through the caval wall.