What does the immediate surgical repair of an AAA typically require for size?

The immediate surgical repair of an abdominal aortic aneurysm (AAA) is typically indicated when the aneurysm reaches a diameter of 5.0 cm or larger. This threshold is based on evidence that aneurysms of this size have a significantly higher risk of rupture, which can be life-threatening and requires emergency intervention.

The decision to perform surgical repair is aimed at preventing complications such as rupture, which occurs more frequently as the size of the aneurysm increases. At sizes less than 5.0 cm, the risk of rupture is considerably lower, and conservative management with monitoring is usually recommended unless there are specific risk factors or symptoms present. Thus, a size of 5.0 cm serves as a critical point for surgical management within the current clinical guidelines for AAA.