Endoleak Repair After Aortic Stent Grafting - Florida Interventional Specialists

Image-guided treatment of endoleaks after aortic stent graft repair.

Endoleak repair is a minimally invasive, image-guided procedure for patients who have already had EVAR or TEVAR for an aortic aneurysm and are now found to have ongoing blood flow into the aneurysm sac on follow-up imaging.

If you have already had EVAR or TEVAR for an aortic aneurysm, your follow-up surveillance imaging may have identified an endoleak — persistent blood flow leaking around or through your stent graft into the aneurysm sac. Endoleaks are common, sometimes self-limiting, but in many cases require treatment to prevent the aneurysm from continuing to grow. Most can be repaired through the same minimally invasive, image-guided approach that placed the original graft.

Endoleaks are detected on routine post-EVAR or post-TEVAR surveillance imaging — usually CT angiography or duplex ultrasound — and require careful classification before treatment is planned.¹

What is an endoleak?

After an aortic aneurysm is repaired with an endovascular stent graft (EVAR for abdominal aneurysms, TEVAR for thoracic), the goal is to seal the aneurysm sac off from blood flow so it can shrink and stabilize. An endoleak is persistent blood flow into the sac despite the graft being in place. There are five recognized types, named by source:

Type I — leak at the proximal or distal seal zone, where the graft meets healthy aorta. Type II — the most common, with backward flow into the sac through small branch arteries (typically lumbar or inferior mesenteric). Type III — structural failure of the graft itself. Type IV — porosity through the graft fabric (rare with modern grafts). Type V (endotension) — sac expansion without a visible leak. The 2018 Society for Vascular Surgery AAA guidelines recommend prompt treatment of type I and III endoleaks; type II endoleaks are managed expectantly and treated when the sac is enlarging.²

Why this matters

An endoleak that leaves the aneurysm sac pressurized over time can cause continued aneurysm growth and, in the worst case, rupture — even after a successful initial graft placement. Image-guided endoleak repair corrects the leak through small access points, without the major surgery required to convert to open repair.

How the procedure works

Endoleak repair is tailored to the type of leak and is performed under sedation or general anesthesia in a hospital interventional or hybrid suite. The starting point is detailed imaging review — typically CT angiography — to identify the leak’s source, classify it, and plan the safest access route.

For type II endoleaks, the most common, treatment is usually transarterial or translumbar embolization. A catheter is guided into the feeding branch artery (or directly into the aneurysm sac through the back), and embolic agents — coils, n-BCA glue, Onyx, or sclerosant — are deployed to seal off the source. A 2017 systematic review reported clinical success of approximately 70% for transarterial and 81% for translumbar embolization, with major complication rates under 4%.³Type I endoleaks may require an additional stent graft cuff, balloon-assisted sealing, or sclerosant. Type III endoleaks usually require placement of a relining graft segment to bridge the structural defect. The procedure typically takes 1 to 3 hours.

What to expect

Endoleak repair is typically a same-day or overnight procedure with structured follow-up to confirm successful seal.

Pre-procedure planning

We review your prior imaging — including the original EVAR or TEVAR films and your most recent surveillance CT — to classify the endoleak and choose the right approach. Your vascular surgery team is included whenever possible.

The procedure

Under sedation or general anesthesia, access is established through the femoral artery, the back, or another route depending on leak type. Embolic materials, additional graft components, or sealing agents are deployed under live imaging until the leak is no longer visible on completion angiography.

Same-day or overnight discharge

Most patients are observed for several hours and discharged the same day or after one night. Activity restrictions are minimal — typically a few days of rest before light normal activity.

Surveillance imaging

Structured imaging follows at 1 month, 6 months, and yearly to confirm the leak is sealed and the sac is stable or shrinking. Type II endoleaks can recur, and ongoing follow-up is essential.⁴

Who is a good candidate?

Endoleak repair is appropriate for patients with confirmed endoleaks following prior EVAR or TEVAR. You may be a candidate if any of the following apply:

Type I or type III endoleak on surveillance imaging — high-pressure leaks that generally require prompt repair
Type II endoleak with sac enlargement — persistent type II leaks with measurable growth on serial imaging warrant treatment. Long-term EVAR-1 data confirm that sac growth carries meaningful late risk of rupture and re-intervention⁵
Recurrent endoleak after prior repair — second and third interventions are common
Sac expansion without identifiable leak (type V / endotension) — selected cases may benefit from sac decompression or relining

Endoleak repair is always coordinated with your vascular surgery team and the imaging center handling your surveillance.

Who performs endoleak repair

Endoleak repair is performed by interventional radiologists and vascular surgeons. The common thread is image-guided, minimally invasive technique — every procedure depends on detailed imaging interpretation, precise catheter navigation, and selective embolization. At Florida Interventional Specialists, every endoleak repair is delivered in close partnership with the vascular surgery team.

Frequently asked questions

How is a type II endoleak treated?

With image-guided embolization — coils, n-BCA glue, Onyx, or sclerosant delivered into the feeding branch artery or directly into the aneurysm sac through a translumbar approach.

Is endoleak repair painful?

The procedure is performed under sedation or general anesthesia. Most patients describe recovery as straightforward, with minor soreness at the access site and no large surgical incision.

Do all endoleaks require treatment?

No. Type I and type III endoleaks almost always require treatment. Type II endoleaks are typically only treated when the aneurysm sac is enlarging on serial imaging.

How long does endoleak embolization take?

1 to 3 hours, depending on type, anatomy, and access route. Most patients are discharged the same day or after one night.

Can endoleak repair be done after fenestrated or branched aortic repair?

Yes — selected complications after fenestrated, branched, or hybrid aortic repairs are treatable through an image-guided approach. The decision is made together with your vascular surgery team.

References

Chaikof EL, Dalman RL, Eskandari MK, et al. The Society for Vascular Surgery practice guidelines on the care of patients with an abdominal aortic aneurysm. J Vasc Surg. 2018;67(1):2–77.e2.
White GH, Yu W, May J, Chaufour X, Stephen MS. Endoleak as a complication of endoluminal grafting of abdominal aortic aneurysms: classification, incidence, diagnosis, and management. J Endovasc Surg. 1997;4(2):152–168.
Guo Q, Zhao J, Huang B, et al. A systematic review of management of type II endoleak after endovascular abdominal aortic aneurysm repair. Ann Vasc Surg. 2017;42:317–328.
Wanhainen A, Verzini F, Van Herzeele I, et al. Editor’s Choice — European Society for Vascular Surgery (ESVS) 2019 clinical practice guidelines on the management of abdominal aorto-iliac artery aneurysms. Eur J Vasc Endovasc Surg. 2019;57(1):8–93.
Patel R, Sweeting MJ, Powell JT, Greenhalgh RM; EVAR Trial Investigators. Endovascular versus open repair of abdominal aortic aneurysm in 15-years’ follow-up of the UK EVAR-1 randomised controlled trial. Lancet. 2016;388(10058):2366–2374.

Schedule a consultation in Tampa, FL

If your post-EVAR or post-TEVAR surveillance imaging has shown an endoleak or aneurysm sac growth, the first step is a coordinated review of your imaging with your vascular surgery team and ours. Florida Interventional Specialists serves patients across Tampa, St. Petersburg, Clearwater, Brandon, Wesley Chapel, and the Gulf Coast region.

Call 813-844-4570

Talk to our team

Our office can answer questions about endoleak repair, surveillance imaging, and how the procedure coordinates with your existing vascular care team.

813-844-4570

Monday – Friday, 8:00 AM – 5:00 PM

Endoleak repair at a glance

Procedure time: 1–3 hours
Anesthesia: Sedation or general
Access: Femoral, translumbar, or transcaval
Hospital stay: Same-day or one night
Coordinated with: Your vascular surgery team
Follow-up: CTA at 1 month, 6 months, yearly

THE SERVICES LISTED ON THIS WEBSITE ARE FOR GENERAL INFORMATION PURPOSES ONLY AND DO NOT INCLUDE ALL SERVICES OF FLORIDA INTERVENTIONAL SPECIALISTS. WHILE WE STRIVE TO KEEP THE INFORMATION UP TO DATE AND CORRECT, WE MAKE NO REPRESENTATIONS OR WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, ABOUT THE CONTENT, COMPLETENESS, ACCURACY, RELIABILITY, LEGALITY, SUITABILITY OR AVAILABILITY, WITH RESPECT TO THE SERVICES CONTAINED ON THIS WEBSITE.

Tampa Bay’s Women’s Health and Fibroid Community

Florida Interventional Specialists provides image-guided, minimally invasive treatments for uterine fibroids, heavy menstrual bleeding, and adenomyosis to women across Tampa, St. Petersburg, Clearwater, Brandon, Wesley Chapel, and the Gulf Coast region.