Blocks take time to set up. When you do a block in 5 minutes and wheel the patient back immediately, it might not have set up by the time incision is made especially when injecting around the nerve and not directly into it. The former is favored for many blocks because less theoretical risk of nerve injury. And perhaps eventually it will set up so by end of case it will be fine.
@GravelRider who said anything about "fake blocks"? That is billing fraud. I said no such thing.
@UscGhost claims PP fo blocks in 5 minutes that is superior while academics take 45 min. I think that is the claim here thay stretches to incredulity.
So... do you sedate the patients you do your blocks for? Or do you GA them? Is it an analgesic block or a surgical block? That is at the heart of my comments.