You're welcome, Fisherman.
I am unable to answer that question other than what was done for me. Due to my then respiratory illness, they went for spinal rather than local anesthesia. I regretted that later because it messed up my plumbing for days afterwards. As I understood my situation, however, there was no choice in the matter.
Sorry I'm not sufficiently schooled in this. It was so long ago. Now, I do research before I say "yes" to anything medical. That's another entire chapter of my life.
Take care.
CoCo