Diagnosis

Mass screening for AAA is not feasible from a cost perspective and is therefore limited to high risk patients.

Figure 18.1. Risk of aortic aneurysm rupture based of size. Adapted from Haiiett J. Management of abdominai aortic aneurysms. Mayo Ciinic Proceedings Aprii 2000; Voi. 75(4): 395-399.

Ultrasound has a sensitivity of 99-100% and can easily be used to longitudinally follow AAA. Ultrasound is operator-dependent but has been found to be reproducible to within 0.3 cm.

CT scan is 100% sensitive and specific and is probably more accurate than US. CT is costly and remains secondary for following aneurysms over time.

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