In my case, Gail, the tilt table test was used to try to precipitate the fainting symptoms I had been suffering.
To be honest, I don't know what else they use it for, although there is lots of info on the Web. I researched, but just paid attention to what was relevant to my case.
Gary, perhaps they do turn people upside down for other purposes. I was only feeling faint when upright, so that's what they were testing for. The problem is that, by the time they did the test, my symptoms had pretty much already disappeared. Oh well!
I would love to have an Invertor like you have Gary. I used to do yoga headstands a lot and they were great for circulation, etc. However, I'm not in the shape I used to be and having something like what you have sounds a lot easier. Could you give me some sources for where I could get one?
Thanks,