Doppler Ultrasound Screening is not needed for anything

An on-line health clinic is selling these doppler ultrasound scans related to stroke risk saying they:
1. Stroke/carotid artery screening
2. Abdominal aortic aneurysm screening
3. Peripheral arterial disease screening (of lower extremeties).
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And what actions would they suggest one should take based on either a positive or negative result?

There are no standards of how this test should be incorporated into a risk assessment for vascular disease; that is, no one can reliably tell you what to do about the results except maybe to get your cholesterol checked, loose weight, eat better, see a doctor. You don't need this machine to tell you that. There are also no standards to say when the results are clinically significant. Your test could be interpreted as abnormal and you still may live a long disease-free life.

There are great standards for screening and assessing risk. Probably cheaper too: www.nhlbi.nih.gov/guidelines/cholesterol/atp3xsum.pdf

At best, this is an expensive way to promote health awareness, which is likely the only way this test can help one "avoid strokes."

(I would like to know how many abdominal aortic aneurysms they are finding while screening a general public.)