Hi there...
I had LSB's done last year and they sedated me too, please do not eat if they tell you not to.. I had one bad hangover from the one procedure I forgot to not eat and they said if I forget and eat to let them know and perhaps no sedation that day or posponment. was very nausious.

The sedation they had me on was lighter than they use for surgerys they don't take you under as far I was told. There are diffrent types of blocks some take longer than others but as far as I know a properly done LSB or SGB should always be done under floroscopy.

Good luck and I hope you get a good lasting response.