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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/

vor 2 Tagen

The Inguinal Ligament Myth: What Really Drives Stent Failure

This episode pairs a 22-year Stanford retrospective of 1,094 lower extremity venous stents in 406 patients with the 3-year VIVO IDE trial of the Zilver Vena stent, and asks whether crossing the inguinal ligament actually dooms a venous stent. Where the Rule Came From: The recommendation against stenting below the lesser trochanter traces back to citations from 1987 and 1997 that evaluated surgical bypass grafts, not endovascular stents.Apples to Oranges: Mabud reports 57.3% five-year primary patency against VIVO's 90.3% three-year ultrasound patency, but Mabud counts any reintervention as failure. Its five-year assisted patency is also 90.3%.Below the Ligament: Stents extended below the ligament in 32.5% of VIVO patients, with statistically identical 30-day safety (96.2% vs 96.9%, P = .76) and no significant patency difference at 12 months (83.3% vs 93.0%, P = .31). The higher reintervention rate tracked with worse baseline disease: lesions averaged 15.6 cm versus 7.1 cm and were four times more likely to be fully occlusive.Hardware Is Not the Problem: Across roughly 1,459 stents spanning 30 years of technology, including stents landed in the common femoral, femoral, and popliteal veins, there were zero reported fractures.Practical Rule: Normal vein to normal vein, securing at least 8 mm of healthy inflow, downsizing to 10 to 12 mm infra-inguinally. Post-stent, a DOAC alone is sufficient, since adding aspirin increases bleeding without improving patency.Tune in to learn why inflow quality, not an anatomic landmark, should decide where your stent lands. 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.Mabud TS, Cohn DM, Arendt VA, et al. Lower extremity venous stent placement: a large retrospective single-center analysis. J Vasc Interv Radiol. 2020;31(2):251-259. Comerota AJ, Gagne P, Brown JA, Segbefia E, Hofmann LV; VIVO Clinical Study Investigators. Final 3-year study outcomes from the evaluation of the Zilver Vena venous stent for the treatment of symptomatic iliofemoral venous outflow obstruction (the VIVO clinical study). J Vasc Interv Radiol. 2024;35(6):834-845.
vor 5 Tagen

The TIPS Trade-Off: Bleeding vs. Brain

This episode tackles the "Goldilocks dilemma" of TIPS: finding the stent diameter that stops a life-threatening variceal bleed without silently destroying a patient's cognition. Listen to the end to hear the expert commentary from Ziv Haskal from University of Virginia. Metabolic Cost: A TIPS decompresses the portal system but shunts ammonia-rich blood past the liver's filter and into the brain, where it triggers the astrocyte swelling behind hepatic encephalopathy (HE).8mm vs. 10mm: The Huang meta-analysis found that 8mm stents delivered better one- and three-year survival and lower HE risk than 10mm stents, despite slightly more shunt dysfunction.6mm vs. 8mm: The Zhang RCT randomized 144 cirrhotic patients to 6mm or 8mm stents. The 6mm group had a higher 2-year rebleeding rate (35.2% vs. 24.1%) but far less overt HE (20.3% vs. 42.0%), with nearly identical survival (84.6% vs. 83.0%).Population Question: The Gong meta-analysis backs this up across mostly Asian cohorts, showing 6–7mm stents roughly halve HE risk versus 8mm without hurting survival. But the data leans on smaller Asian liver volumes and may not translate directly to Western patients.Guideline Shift: EASL now recommends small-diameter stents for patients at high risk of HE, reflecting a shift toward accepting a bit more rebleeding risk to protect the brain.Caveats: The Zhang trial was single-center and open-label, and Gong's conclusions lean on retrospective data that can't fully settle the shunt-dysfunction debate the way Huang's harder data can.Tune in to learn why the field is moving from "bigger is safer" to personalized stent sizing based on individual liver anatomy. 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. Zhang W, Zhang M, Xiao J, et al. Efficacy of 6-mm and 8-mm Transjugular Intrahepatic Portosystemic Shunt for Variceal Bleeding: A Randomized Controlled Trial. Clin Gastroenterol Hepatol. 2026;24(1):161-171. doi:10.1016/j.cgh.2025.06.023Gong J, Xia Z, Zhou Z, Chen L, Wang X, Zhou F. Effectiveness and prognosis of covered stents with different diameters in transjugular intrahepatic portosystemic shunt: a meta-analysis. Eur J Gastroenterol Hepatol. 2024;36(2):229-237. doi:10.1097/MEG.0000000000002696Huang Z, Yao Q, Zhu J, He Y, Chen Y, Wu F, Hua T. Efficacy and safety of transjugular intrahepatic portosystemic shunt (TIPS) created using covered stents of different diameters: A systematic review and meta-analysis. Diagn Interv Imaging. 2021;102(5):279-285. doi:10.1016/j.diii.2020.11.004
5. Aug.

From CTA to the Angio Suite: A GI Bleeding Playbook

This episode breaks down the 2024 ACG/Society of Abdominal Radiology consensus statement alongside a 2025 Duke University update, mapping out exactly which imaging test to reach for at each stage of a GI bleed and when IR should step in. Dr. Rusty Hofmann from Stanford University closes with his commentary. CTA Takes First-Line: For unstable patients or high clinical suspicion, CTA now leads with ~95% accuracy, and even a negative scan is useful, it predicts lower rebleeding and reintervention rates.The RBC Scan's Blind Spot: Reserved for stable, post-negative-colonoscopy cases, tagged RBC scans carry a 10-33% localization error, enough to send an IR team down the wrong vessel entirely.CTE Over Capsule for Small Bowel: CT enterography is now preferred first-line for small bowel bleeding, especially with capsule-retention risk or suspected GISTs that a pill camera would miss.Coils Beat Particles: At the vasa recta, particle embolization carried 5.3% severe ischemia risk versus 0% for coils alone, a strong case for targeted, extravasation-confirmed embolization.The Break-Glass Option: When all standard imaging fails, provocative mesenteric angiography proved safe via first-pass hepatic clearance of TPA, but only pays off with hematochezia plus a prior positive study; melena with clean imaging predicts a wasted procedure.Tune in to build a modality-by-modality protocol, from first scan to break-glass angiogram. 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.ACG and SAR Consensus Statement on GI Bleeding Imaging: Sengupta N, Kastenberg DM, Bruining DH, et al. The Role of Imaging for GI Bleeding: ACG and SAR Consensus Recommendations. Radiology. 2024;310(3):e232298Duke University Provocative Angiography Study: Benvenuti et al. Provocative Mesenteric Angiography for Obscure Gastrointestinal Hemorrhage: An Update on Outcomes, Safety, and Predictors of Success. J Vasc Interv Radiol. 2025;36:1558-1566
29. Juli

48 Hours to Failure: Anticoagulants and Portal Vein Stents

This episode breaks down a 2026 JVIR retrospective study from the Mayo Clinic (Bretzman et al.), examining portal vein stent outcomes in 182 pancreatic cancer patients, and why the usual fixes for early stent failure may be missing the real cause. At the end, Dr. Rusty Hofmann from Stanford University adds his commentary on the paper. The Surprise on Hardware: Covered vs. bare metal stents showed no significant patency difference, and residual stenosis over 30% didn't predict failure either. This runs counter to standard mechanical assumptions.Fast, Not Slow, Failure: With 74.6% patency at one year, the stents that do fail occlude fast, a median of just 2 days, pointing to acute thrombosis rather than gradual tumor ingrowth.The Real Driver: The strongest predictors were pre-existing portal occlusion, periportal inflammation, and robust collaterals, evidence for "immunothrombosis," where tumor-driven inflammation triggers clotting at the stent itself.The Anticoagulation Question: Despite 74.7% of patients on anticoagulation, it showed no significant patency benefit, though study limitations leave room for debate.Dr. Hofmann's Take: He pushes back in his closing commentary, arguing that dosing and drug choice matter more than the paper suggests, and that tissue factor from direct tumor invasion, not anticoagulation intensity, is the real culprit.Tune in to find out whether it's the blood thinner or the biology calling the shots. 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. Bretzman J, Andrews J, Ge S, Kassmeyer B, Fleming C. Portal vein stent placement in a pancreatic cancer cohort: outcomes and predictors of portal stent occlusion. J Vasc Interv Radiol. 2026;37(8):108852. doi:10.1016/j.jvir.2026.108852.
22. Juli

Wrist vs. Risk: Rethinking Transradial Access After MOSAIC

This episode unpacks a letters-to-the-editor debate sparked by the MOSAIC study (a Japanese multi-center trial in JVIR) and turns it into a practical framework for reducing embolic stroke risk during transradial visceral and hepatic interventions. Of 55 patients who underwent transradial access, 9 (16.4%) showed silent brain infarction on post-procedure MRI. It's the Plaque, Not the Angle: Eight of nine stroke patients were over 70 (mean age 80). The letters argue calcified arch plaque, not subclavian angulation, is the real culprit, and propose a pre-procedural chest CT for patients over 70, defaulting to femoral if significant arch plaque is found.Time in the Arch Matters: Stroke cases averaged 9 minutes to reach the descending aorta versus 1 minute for non-stroke cases. The fix: minimize arch exchanges and favor a microcatheter/micro-guidewire combo with soft J-tip wires over angled hydrophilic ones.Rethinking Anticoagulation: ACT-guided heparin dosing is unreliable transradially, risking silent under-heparinization. The proposed alternative is a fixed protocol: 3,000–5,000 IU upfront, then 1,000 IU every 30 minutes, ignoring ACT entirely. Tune in to learn how patient selection, wire technique, and a rethought anticoagulation strategy can keep silent strokes off your transradial cases. 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.Iezzi R, Bilhim T, Pua U, et al. Radial access in interventional radiology and the risk of stroke: lessons learned. J Vasc Interv Radiol 2026; 37:108778. https://doi.org/10.1016/j.jvir.2026.108778Koretsune Y, Sone M, Higashihara H. Authors' reply to "Radial access in IR and the risk of stroke: lessons learned." J Vasc Interv Radiol 2026; 37:108777. https://doi.org/10.1016/j.jvir.2026.108777
15. Juli

Venous Stents: How Much Inflow is Enough?

This episode breaks down two recent retrospective studies in deep venous work: a stent that looks well deployed on the table can still thrombose within weeks, because the low-flow venous system punishes any stasis. Following, there is a great commentary by Dr. Rusty Hofmann from Stanford University. Clinical Question: Can venous stent outcomes, long treated as operator-dependent and hard to forecast, be predicted before intervention from anatomy and inflow quality alone?Anatomical Classification: A multicenter EJVES study of 1,033 patients proposed a five-type system graded by how far chronic venous obstruction extends, from a non-thrombotic iliac lesion (type 1) to obstruction of both main inflow veins (type 5). Twelve-month primary patency dropped step by step with extent: 94.9%, 90.3%, 80.8%, 60.6%, and 39.4% for types 1 through 5.Inflow Quality: A single-center JVIR study of 80 post-thrombotic limbs isolated inflow as the mechanism. One-year primary patency was 89.2% with no inflow disease, 57.7% with single-vessel disease, and 47.1% with double-vessel disease. Femoral vein inflow disease was the only independent predictor of failure, with an odds ratio of 10.99.Timing and Salvage: In the JVIR cohort every primary patency loss occurred within the first 30 weeks, yet secondary patency stayed high in both studies. Stenting complex disease is best framed to patients as a re-intervention pathway, not a single definitive fix.Limitations: Both studies are retrospective, without a core lab, and grade inflow visually rather than by any flow-volume metric, so the reported later patency numbers likely run optimistic. Tune in to learn how anatomical extent and inflow quality can turn one of the least predictable procedures in the venous space into a risk-stratified workflow with honest expectations set up front. 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. Jalaie H, Barbati ME, Piao L, et al. Prognostic value of a classification system for iliofemoral stenting in patients with chronic venous obstruction. Eur J Vasc Endovasc Surg. 2025;69:315-322. https://doi.org/10.1016/j.ejvs.2024.10.002 Bakas JM, de Wolf MAF, van den Bos RR, et al. Venous stents placed for postthrombotic syndrome: the role of inflow disease on patency. J Vasc Interv Radiol. 2025;36:446-455. https://doi.org/10.1016/j.jvir.2024.11.030
8. Juli

14 Experts, One Consensus: How to Make Prostate Embolization Safer

This episode breaks down a 2026 Journal of Vascular and Interventional Radiology Delphi consensus in which 14 international experts standardized the technical steps of prostatic artery embolization (PAE) for benign prostatic hyperplasia (BPH). Across six procedural domains, the panel worked to turn a technically demanding, anatomy-dependent procedure into a set of evidence-based best practices. Clinical Question: Can a procedure defined by wide anatomical variability and operator-dependent outcomes be standardized enough to make PAE safer and more reproducible?Access Route: The panel reached 93% agreement that both radial and femoral access are acceptable. Radial offers same-day comfort but carries a real tradeoff: a recent prospective study found silent brain infarctions in up to 40% of cases. That risk can be significantly reduced with periprocedural anticoagulation and by cannulating the descending aorta in under 58 seconds.Embolic Choice: With 86% agreement, 300 to 500 μm particles remain the preferred baseline. The best available randomized trial showed they deliver similar midterm effectiveness to 100 to 300 μm particles with fewer minor adverse events, helping settle a long-running particle-size debate.Imaging: Intraprocedural cone-beam CT earned 86% agreement as a recommended step for mapping the hemipelvis, identifying nontarget vessels, and reducing procedure time and radiation.Nontarget Protection: The panel hit 100% agreement that protective coil embolization of rectal and accessory pudendal branches is safe, with multiple studies showing no deterioration in erectile function.Emerging Techniques: Liquid embolics and the coil-out technique are promising for the roughly 20% of patients who recur, but the consensus is clear that neither yet has the long-term data to replace standard particle embolization.Tune in to learn how 14 experts turned one of interventional radiology's most anatomically variable procedures into a standardized, safer workflow. 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. Rostambeigi N, Sapoval M, Bilhim T, et al. Standardized technique for prostatic artery embolization: a Delphi consensus study on optimized methods and emerging concepts. J Vasc Interv Radiol. 2026;37:107902. https://doi.org/10.1016/j.jvir.2025.10.033
24. Juni

New PE Guidelines: When to Intervene

This episode breaks down the 2026 AHA/ACC/ACCP/ACPPE pulmonary embolism guidelines, highlighting the biggest changes to PE risk stratification, catheter-based interventions, and long-term follow-up. It also discusses how new randomized trials like STORM-PE and HI-PEITHO are shaping the future of interventional PE care. Biggest Change: The traditional "massive" and "submassive" PE classifications have been replaced with a new A through E risk framework, placing greater emphasis on dynamic clinical assessment and early recognition of patient deterioration.High-Risk Patient: The guidelines introduce Category D2, or normotensive shock, recognizing that patients with normal blood pressure but elevated lactate or signs of end-organ hypoperfusion may require urgent intervention.New Data Shows: Recent randomized trials demonstrated that catheter-based therapies improve right ventricular recovery and reduce clinical decompensation in intermediate-high risk PE, although long-term mortality benefits remain under investigation.Safety Pearl: The guidelines strongly caution against routine deep sedation in acute PE, noting a markedly increased risk of cardiopulmonary collapse with propofol in unstable patients.Bottom Line: These guidelines shift PE management from static risk categories to continuous reassessment and reinforce that interventional specialists should play an active role in both acute treatment and long-term follow-up.Tune in to learn how the new PE guidelines could change which patients receive intervention and when. Wysdom recommends that you check out PECompass.org. It was founded by Dr. Mona Ranade from Stanford IR and also a co-author of this paper. It is a great app in which you put in the clinical information about your patient and it will calculate what category your patient fits into. 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. Bulman JC, Ranade M, Sista AK, Lookstein RA, Wilkins LR. The 2026 AHA/ACC/ACCP/ACEP/CHEST/SCAI/SHM/SIR/SVM/SVN Guideline for the Evaluation and Management of Acute Pulmonary Embolism in Adults: Pertinent Points for the Interventional Radiologist. J Vasc Interv Radiol. Published online 2026. doi:10.1016/j.jvir.2026.108899

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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/

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