Well im a bit biased lol, but only because I know how I got RSD, and it was from ischemia.

Besides that, I do remember that survey but I think it was waayy back on BT1. At least I think it was.

If you look at the history of RSD you will find alot of reference to tourniquets resulting in what we now call RSD. There even is some inference about RSD following low to no blood surgeries.

My vascular surgeon told me that every vascular surgeon knows that RSD follows certain ischemic conditions, but usually dont start treatments for it, or even tell the patient it may happen to them. They are more intent on fixing the problem at hand, not something they cant fix.