Question

The size cut-off for surgical repair of an asymptomatic abdominal aortic aneurysm is:

• A. 5.5 cm
• B. 6.5 cm
• C. 7.5 cm
• D. 8.5 cm

Hint:

Repair an asymptomatic AAA once it exceeds 5.5 cm.

Answer 1

The Correct Option is A

Step 1: Frame the decision as a balance: small aneurysms are watched, large ones are fixed. The standard diameter that tips an asymptomatic case toward operation needs to be recalled.
Step 2: Guidelines set the operative threshold for an asymptomatic infrarenal abdominal aortic aneurysm at a diameter exceeding 5.5 cm, because beyond this point annual rupture risk climbs steeply. Below this the patient enters a surveillance programme with serial ultrasound. Separately, any aneurysm that becomes symptomatic or enlarges rapidly is repaired regardless of absolute size. Thus 5.5 cm is the answer.
Step 3: Discard 6.5, 7.5 and 8.5 cm - delaying repair to these diameters needlessly increases the chance of fatal rupture, so they are not the recommended cut-offs.
\[\boxed{5.5\ \text{cm}}\]