Screening
AAA Screening
AAA screening is a quick ultrasound of the tummy that checks the main blood vessel (the aorta) for a bulge called an aneurysm, which can be dangerous if it bursts.
Quick answer
AAA Screening: what it is and what the results mean
Abdominal aortic aneurysm (AAA) screening uses an ultrasound scan to measure the width of the aorta in the abdomen. An aneurysm is a swelling that can enlarge over time and, rarely, burst.
- Why it is done: It is offered to men around the age of 65, who are at higher risk, to find aneurysms early.
- Understanding results: A normal-width aorta means no aneurysm and no further scans are usually needed.
What it is
Abdominal aortic aneurysm (AAA) screening uses an ultrasound scan to measure the width of the aorta in the abdomen. An aneurysm is a swelling that can enlarge over time and, rarely, burst.
Why it is done
It is offered to men around the age of 65, who are at higher risk, to find aneurysms early. Most found are small and simply monitored, but detecting a large one allows planned treatment before it becomes an emergency.
What to expect
Gel is placed on the tummy and a probe is moved over it to measure the aorta; the scan is painless and takes only about 10–15 minutes. You get the result on the day.
Understanding the results
A normal-width aorta means no aneurysm and no further scans are usually needed. A small or medium aneurysm is monitored with regular scans, and a large one is referred to a specialist to discuss treatment such as surgery.
Good to know
Risks and limitations
The ultrasound is completely safe with no radiation. Screening only checks the abdominal aorta at one point in time, so any new symptoms should still be reported even after a normal result.
Education and reference only. This explains the test in general terms and is not medical advice. Always follow the specific instructions from the team arranging your test, and discuss your results with your clinician.
Answers
AAA Screening: frequently asked questions
Who is offered AAA screening?
In the UK it is offered mainly to men in the year they turn 65, as they are at higher risk. People with a family history or other risk factors can ask their GP about being checked.
What happens if an aneurysm is found?
Small aneurysms are simply monitored with regular scans, as most never cause problems. Larger ones are referred to a specialist to discuss planned treatment to prevent them bursting.
Related tests
Other screening investigations
Sources
Where this is drawn from
- NHS — Tests and treatments
- NICE — diagnostic guidance
- UK National Screening Committee / relevant professional body
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