What anatomical condition must be present for placing an endovascular repair stent in an AAA?

For placing an endovascular repair stent in an abdominal aortic aneurysm (AAA), a suitable anatomical condition is critical to ensure successful device placement and long-term outcomes. The need for a landing zone at least 1.5 cm distal to the renal arteries is fundamental. This zone serves as the area where the stent graft will rest and attach securely to the aorta, providing adequate fixation and preventing complications such as endoleaks.

The proximal landing zone must be free from significant angulation and have sufficient length to allow for the effective deployment of the stent. If the landing zone is too close to the renal arteries, there is a risk of compromising blood flow to these vital vessels, potentially leading to renal ischemia. By requiring a distance of at least 1.5 cm, it ensures that the renal arteries are preserved and that the stent can be anchored adequately.

In contrast, excessive angulation or severe calcification in the area can complicate the stent placement and increase the risk of failure or complications. Ensuring a proximal landing zone larger than 2.5 cm is also important, but the specific distance of being at least 1.5 cm distal to the renal arteries is a more crucial factor to guarantee both stability