Fenestrated Endograft (FEVAR)

Illustration of endograft and stents placed for aortic aneurysm repair

About FEVAR for Abdominal Aortic Aneurysms

The Fenestrated Endograft (FEVAR) is a relatively new minimally-invasive option for people with abdominal aortic aneurysms who don’t qualify for traditional endovascular aneurysm repair (EVAR).

Traditional EVAR works when aneurysms are located far enough from the renal (kidney) arteries, which branch off the aorta, that the stent can be securely attached to the aorta.

But for approximately 10 percent of patients with an abdominal aortic aneurysm, the aneurysm is too close to the arteries that branch off to the kidneys for traditional EVAR to work. The location of this aneurysm is complicated to treat and often requires open surgery to repair the weakened wall. Until recently, the only option these patients had was major abdominal surgery or no surgery at all.

The unique feature of fenestrated endografts is that they can cover branch arteries of the aorta (such as the renal arteries) because the graft has fenestrations, or holes, that correspond to the position of the branching arteries within the aorta to allow for blood to flow through the graft into the branch vessel.

The fenestrated endograft is inserted into the femoral artery via an incision in the groin percutaneously, or through the skin. It is then guided through the blood vessel to the aneurysm.

The fenestration holes are then positioned over the openings of the branch vessels such as the renal arteries so that the blood flow continues to these vital vessels while the graft is secured in place.

Once the fenestrated endograft is implanted inside the aneurysm, blood can now flow through the diseased area without putting pressure on the aneurysm, as well as allow blood to flow to other branch vessel organs such as the kidneys.

Fenestrated endografts offer a number of benefits over open surgery, including shorter hospital stays, fewer complications and risks, and faster recovery times.

Patient Resources

Make an Appointment

To make an appointment to discuss your need for treatment for aortic aneurysm or other cardiovascular treatment, call the U-M Frankel Cardiovascular Center toll-free at 888-287-1082 or email us at CVCCallCtr@med.umich.edu. Visit our Make a Cardiovascular Appointment page for more information about what to expect when you call us.