Dolfinz,
I had a series of 3 flouriscopically guided cervical injections 3 or 4 yrs. ago. I'm not sure that I had the same thing you're talking about and if not, it's probably the same general idea. It wasn't painful at all. I had an IV and they put something in it that made me pretty loopy I wasn't completely out because I would come to a little and hear them talking but for the most part, I was dozing. The problem for me though was that they didn't help at all except for a day or so. I saw a neurosurgeon a couple of months afterwards and also another PM dr. and both said that the injections wouldn't have helped me in the first place because my problem and pain wasn't coming from the cervical spine. I hope you have better luck!