Abdominal Aortic Aneurysm Screening Guidelines

Primary Screening Recommendations

Men aged 65-75 who have ever smoked should receive one-time ultrasound screening for abdominal aortic aneurysm, as this reduces AAA-specific mortality by approximately 50% 1, 2, 3
The American College of Physicians recommends one-time ultrasound screening for men aged 65-75 who have ever smoked, with a Grade B recommendation 1, 2, 3
Screening with appropriate treatment reduces AAA-specific mortality by approximately 43-50% in men aged 65-75 who have ever smoked 1, 4, 3

Ultrasound is the gold standard for AAA screening, with sensitivity 95% and specificity approaching 100% 7, 6
The American College of Radiology recommends that ultrasonography be performed in an accredited facility with credentialed technologists 3
One-time screening is sufficient, and rescreening those with normal initial results provides negligible benefit 7

Small AAAs (3.0-3.9 cm) should be managed with surveillance recommended, using periodic ultrasound monitoring without immediate intervention 4
Intermediate AAAs (4.0-5.4 cm) should be managed with surveillance preferred over immediate surgery, as two randomized trials showed no mortality benefit from immediate repair compared to surveillance 6
Large AAAs (≥5.5 cm in men, ≥5.0 cm in women) should be managed with surgical intervention indicated, using either open repair or endovascular repair (EVAR) 1, 5

Family history is an important risk factor, and first-degree relatives of AAA patients aged ≥50 years warrant screening consideration 3
The Society for Vascular Surgery guidelines include additional criteria that would identify more patients, particularly smokers under age 65 and elderly patients over 70 with no smoking history, although this is not directly cited, family history is 3