wlcasa -- Wow, you have certainly been through a lot and I admire your perseverance! I appreciate all the additional detail and I'm sure others on the forum will find it helpful as well.

I'm familiar with the venous duplex test, but what is the "bilateral arterial/venous TOS evaluation" ? Does it measure blood flow? Or, is it some sort of imaging of the arteries and veins??

Again, thanks for all the additional info...you've given me some hope!