Good luck to you BF... prayers sent. I agree with you about the putting young kids to sleep or making them loopy. I don't like that feeling at all. When my son was 6 weeks old we found out he had pyloric stenosis... it's a condition where the muscle at the bottom of the stomach tightens up so that food cannot be discharged from the stomach to begin the digestion process. They had to put him to sleep to do the surgery that they called "routine". That wasn't a good day for mommy or daddy.
I understand your nervousness.... the Lord will be with him that day and he'll be with you and your wife too!
...and on that day when my strength is failing, the end draws near and my times has come, still my soul will sing Your praise unending, ten thousand years and then forevermore!