The ectatic aorta: no benefit in surveillance.

Area of Science:

• Vascular Surgery
• Medical Imaging
• Public Health Screening

Background:

• Infrarenal abdominal aortic aneurysm (AAA) screening programs identify individuals with aortic diameters requiring monitoring.
• Optimal surveillance frequency for small AAAs (25-30 mm) remains debated.
• Evidence is needed to guide surveillance protocols for this patient group.

Purpose of the Study:

• To evaluate the benefit of continued ultrasound surveillance for patients with infrarenal abdominal aortic aneurysms (AAA) of 25-30 mm.
• To determine the appropriate frequency for surveillance in this patient cohort.

Main Methods:

• Retrospective analysis of 345 patients from the Leicestershire AAA screening program with initial AAA diameter of 25-30 mm.
• Inclusion criteria required at least two surveillance scans.
• Primary endpoints included death from AAA rupture, referral for elective repair, or presentation with rupture.

Main Results:

• A total of 345 patients were followed for a mean of 4.25 years (range 1-11 years).
• At 5 years of surveillance, 97% of patients were free from AAA rupture or referral for repair.
• This suggests a low risk of adverse events within this timeframe.

Conclusions:

• Patients with abdominal aortic aneurysms (AAA) measuring 25-30 mm can be safely monitored with surveillance every 5 years.
• Intensified surveillance protocols may not be necessary for this specific AAA size range.
• This finding supports a less intensive surveillance strategy, potentially reducing healthcare costs and patient burden.