I am sooo sorry, I was not on the computer until this a.m. , I did not mean to leave you hanging.
Anyway, they do a nerve block and that will tell them immediately by the local if that nerve is affected. Now if the local wears off and the block does not work past say 3 hours then they may order a discogram to see if that particular disc is causing a problem with that nerve. Now sometimes the nerve blocks can be successful in treating pain for awhile. But usually the nerve block is used to pinpoint which nerve root if any is being affected. Did you have an MRI that is showing impingemnet?
When I had the nerve block on the cervical area I had no relief
, but that just meant to go on to the next test.... the discogram and that showed it was in fact the disc that was shot and not the nerve.
O.k. I hope I did not leave you hanging here to long and I will check back for any questions you may have.
I have also had the ESI,Facet blocks and Medial branch blocks,
So if you get set up for any of those ....Well I know those too!
Take great care of yourself and check back with me.
P.S. Does not do a lot for the back pain though