The brighter than normal endoluminal stent can be seen, most easily below the level of the ‘trouser legs’ which sit inside the native aorta (above the native aorta bifurcation)

Ultrasound may show findings diagnostic of endovascular stent leak or complication such as:
large endovascular leaks may be seen with colour doppler ultrasound,
if the native aorta is larger than on previous images it suggests endovascular leak,
retroperitoneal haematoma suggests rupture due to endovascular leak.
However, the absence of these does not exclude endovascular stent complications, and it is often technically challenging to see these findings (beyond the scope of basic ultrasound users). Ultrasound thus has a very limited role in the evaluation of an acutely unwell patient who has had an endovascular repair. In this case, there was no leak and the aneurysm diameter was stable.