Which endoleak type is defined by a graft defect?

Which endoleak type is defined by a graft defect?

• A. Type II
• B. Type I
• C. Type III
• D. Type IV

Answer: (C)

Endoleaks reflect blood flow into the aneurysm sac from different sources after EVAR, and the one caused by a defect in the graft fabric or a separation between graft components is defined by a graft defect. This means the leak originates from the device itself—a tear in the fabric or a disconnection between modular stent-graft pieces—allowing high-pressure arterial flow to enter the sac directly through the graft. It is different from leaks at the attachment sites where the seal with the aorta or iliac arteries is incomplete, from retrograde flow entering the sac via collateral vessels, or from graft porosity. Because the problem is a structural failure of the device, it often presents as a high-pressure endoleak and typically requires prompt intervention. On ultrasound, you may see a jet entering the aneurysm sac emanating from the graft area, sometimes seen at or near a graft seam or defect.

Endoleaks reflect blood flow into the aneurysm sac from different sources after EVAR, and the one caused by a defect in the graft fabric or a separation between graft components is defined by a graft defect. This means the leak originates from the device itself—a tear in the fabric or a disconnection between modular stent-graft pieces—allowing high-pressure arterial flow to enter the sac directly through the graft. It is different from leaks at the attachment sites where the seal with the aorta or iliac arteries is incomplete, from retrograde flow entering the sac via collateral vessels, or from graft porosity. Because the problem is a structural failure of the device, it often presents as a high-pressure endoleak and typically requires prompt intervention. On ultrasound, you may see a jet entering the aneurysm sac emanating from the graft area, sometimes seen at or near a graft seam or defect.