Certified Surgical Technologist (CST) Practice Exam

Which aneurysm typically develops between the renal and iliac arteries?

1. Aortic arch

2. Ascending thoracic

3. Abdominal aortic

4. Descending thoracic

The correct answer is: Abdominal aortic

The abdominal aortic aneurysm is the correct answer because it commonly develops in the section of the aorta that is located between the renal arteries and the iliac arteries. This part of the aorta is susceptible to aneurysms due to factors such as hypertension, atherosclerosis, and other vascular conditions that weaken the arterial wall. An aneurysm in this region can lead to significant health risks, including rupture and massive internal bleeding. The clinical importance of identifying an abdominal aortic aneurysm often lies in its potential to be asymptomatic until it reaches a critical size or ruptures, making awareness and early detection key for patient safety. In contrast, the other types of aneurysms listed occur in different anatomical locations or structures. The aortic arch and ascending thoracic aneurysms are positioned higher in the thoracic cavity, while the descending thoracic aneurysm is found lower but still within the thoracic region. None of these options develop between the renal and iliac arteries, which further clarifies why the abdominal aortic aneurysm is the most suitable choice for this specific location.