Prophylactic surgery of a AAA is recommended when it measures ____ cm.

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Multiple Choice

Prophylactic surgery of a AAA is recommended when it measures ____ cm.

Rupture risk from an abdominal aortic aneurysm rises as the diameter increases, so elective repair is timed to balance that risk against the risks of surgery. The commonly used threshold for prophylactic repair in asymptomatic patients is about 5.5 cm. At this size, the chance of rupture becomes high enough that the expected benefit of surgery outweighs its risks in most patients. Smaller aneurysms, like around 4.0–5.0 cm, are usually watched with surveillance because rupture risk is relatively low. Larger aneurysms, around 6.0 cm, carry an even greater rupture risk, but the standard guideline cut-off used in exams is 5.5 cm, with some individual factors (like rapid growth or patient sex) potentially prompting earlier intervention.

Rupture risk from an abdominal aortic aneurysm rises as the diameter increases, so elective repair is timed to balance that risk against the risks of surgery. The commonly used threshold for prophylactic repair in asymptomatic patients is about 5.5 cm. At this size, the chance of rupture becomes high enough that the expected benefit of surgery outweighs its risks in most patients. Smaller aneurysms, like around 4.0–5.0 cm, are usually watched with surveillance because rupture risk is relatively low. Larger aneurysms, around 6.0 cm, carry an even greater rupture risk, but the standard guideline cut-off used in exams is 5.5 cm, with some individual factors (like rapid growth or patient sex) potentially prompting earlier intervention.

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