AAA is a focal enlargement of the abdominal aorta below the renal arteries and is found in up to 4 million patients globally each year. If left untreated it can lead to aneurysm rupture and be fatal in a few hours. It is therefore imperative to provide early, prophylactic treatment of AAA before a rupture occurs. However, the two current leading treatments have major weaknesses. Open surgery is a durable, life-long solution, but can only be performed on low-risk patients (22% of patients). The alternative, EVAR (78%), is minimally invasive with lower immediate risks, but is a much shorter-term solution. EVAR patients require constant monitoring through CT scans (which expose the patient to radiation) to check for graft migration and endoleak. When these inevitably occur, the patient must undergo further interventions which raise costs, add risk, and reduce long-term patient survival.
A solution is greatly needed that combines the long-term durability of open surgery with the low risk, minimal invasiveness of EVAR.