MegansMom wrote:
Taken seriously ? Are you kidding? He deserves a Nobel prize !
Zamboni was studying arterial flow via color Doppler . These tests show red as oxygenated blood and blue as deoxygenated venous blood and he noticed that people with MS had reflux (which looks purple) After he saw this finding a few times he thought it warranted more study. He had amn interest and knew more about MS than the average vascular physician. In looking more deeply into this he discovered more similarities to venous disease. The tissue type, the iron deposits, etc. He pent many years prior to his study in 2008/09. The reason Doppler is used for screening is that it's non invasive and cheap BUT and this is a big but, it has limitations if the technician s not trained. Also the Azygos is not visible with Doppler.
That isn't correct, doppler ultrasound cannot detect oxygenation.
In a doppler scan the red comes from blood flowing in one direction, blue from blood flowing in the other direction. If you have an artery and vein visible at the same time, then usually the blood is travelling in opposite directions, so you can have the arterial flow in red and the venous in blue. Equally though, if you then turn the scanner round 180 degrees then the arterial flow would be in blue and the venous in red.
Reflux would be predominantly in the opposite colour, i.e. if the flow was mainly blue, but then some red temporarily appeared, that would indicate that some blood had flowed backwards. A certain amount of reflux is so common in the veins that I can't imagine what possible significance could be attached to it though.
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