When would a stent graft be favored over balloon angioplasty?

• A. In short-segment disease near the distal vessels
• B. For focal calcifications
• C. To treat isolated ruptured aneurysm
• D. In long-segment disease near bifurcations, aneurysm-related rupture risk, or when sealing capability is needed to prevent recoil or rupture

Answer: (D)

Stent grafts are chosen when the goal is to permanently exclude a diseased arterial segment and provide a durable seal, not just dilate the lumen. In long-segment disease or near branch points, you need a graft that spans the diseased area and creates secure landing zones, often requiring a bifurcated design to fit the anatomy and seal at healthy walls. When there’s aneurysm or rupture risk, excluding the aneurysm with a graft prevents blood from entering the weakened segment and reduces rupture chances, while the grafted conduit provides a scaffold that resists recoil and maintains patency. This combination—long segment, complex anatomy near bifurcations, and the need for a durable seal to prevent rupture or recoil—is exactly what makes a stent graft the preferred option. Short, focal disease or calcifications are typically managed with balloon angioplasty or conventional stenting rather than introducing a graft, and while a ruptured aneurysm can be treated with a graft, the described scenario captures the broader, more definitive indications for grafts.