What is the size threshold for an AAA to be sent to a surgeon for follow-up?

The threshold for an abdominal aortic aneurysm (AAA) to be referred to a surgeon for further evaluation typically occurs at 4.5 cm. This measurement is based on clinical research and consensus guidelines that indicate a greater risk of rupture once the aneurysm reaches this size.

An AAA smaller than 4.5 cm is often monitored through periodic imaging and conservative management, as the risk of rupture in these cases is relatively low. However, once the aneurysm reaches 4.5 cm, the likelihood of needing surgical intervention or repair increases significantly, and therefore, a referral to a surgeon is recommended at this point.

Aneurysms that reach sizes larger than 5.0 cm, for example, are generally considered for immediate surgical intervention due to an even higher risk of rupture, but the critical threshold for referral for evaluation starts at 4.5 cm. This aligns with best practices that seek to balance the risks of intervention with the urgency of managing the condition effectively.