This episode breaks down a 5-year Stanford registry of 82 patients presenting with fractured IVC filters and 185 embolized fragments, with commentary from the paper's lead author, Dr. Andrew Kesselman, from Stanford Interventional Radiology. The question is which fragments to chase and which to leave alone.
- Triage Comes First: Only 87 of 185 fragments (47%) were deemed intravascular and amenable to removal. Retroperitoneal fragments and peripheral pulmonary artery fragments were left alone by protocol, since traction on an extravascular strut risks caval avulsion.
- Geographic Gradient: Technical success was 100% for caval fragments (65 of 65), 64% in the proximal pulmonary arteries, and 50% for both cardiac and hepatic vein fragments, with an overall rate of 89.7%.
- The Cardiac Penalty: The one major complication in the series was a cardiac tamponade during right ventricular fragment removal, giving a 12.5% major complication rate for cardiac attempts. With only 8 attempts, the confidence interval runs from 0.3% to 52.7%, so the signal is directional rather than a number to quote in consent.
- Natural History: Among 19 patients with retained cardiopulmonary fragments, 81% remained asymptomatic at a mean follow-up of 845 days, which supports surveillance for embedded, inaccessible metal.
- Tools by Zone: Rigid endobronchial forceps dissect through neointimal hyperplasia in the cava, where a snare slips off endothelialized metal. Cardiopulmonary work shifts to snares with a steerable sheath to avoid the subvalvular apparatus.
- Caveats: Single center with more than 90% outside referrals and over half having failed prior attempts. The headline success rate applies only to the 47% of fragments selected for an attempt, and radiation burden was never quantified.
Tune in to learn why the hardest part of fragment retrieval is deciding which pieces to walk away from.
This podcast is generated using an AI model that has been trained in the context of endovascular surgery and interventional radiology in addition context of the article cited below. The content was reviewed and edited by multiple healthcare professionals in the field.
Kesselman AJ, Hoang NS, Sheu AY, Kuo WT. Endovascular removal of fractured inferior vena cava filter fragments: 5-year registry data with prospective outcomes on retained fragments. J Vasc Interv Radiol. 2018;29(6):758-764.
What is Wysdom Radio™?
We deliver short, focused episodes on the main concepts and procedures you actually need to know. It’s the perfect clinical companion for your drive to work or your daily workout. Come learn IR on the go!
Check us out at https://www.medicalwysdom.ai/