Hi,
I found that the ultrasound results shocked all people involved in my case!!.....it showed 100% compression in my right side and 50 in the left......

so in answer to your question it is helpful! They do put you in provocative positions in the 90 degree pos. for your arms up and at 90, and other out to the side and then turn you head the other way.

They are looking for compressed blood flow....so go for it!!!! It will only help clarify matters. I had this then went on to the veinogram to get absolute proof before I had even considered a surgery!!! I had to have it as I had almost 90% occlusion of my brachial cephalic vein....not good!!!!

so yes it is a good idea
take care
love and hugs,
Victoria

ps love the neopolitan reference...!!!!!!!!!!!!!!!