I have had several done over the last 15 or so years and they have become so routine that it's less complicated that a root canal. No Kidding. The last few were done at O dark thirty (before 6:00 AM) and I was home by 4 PM.
Previously they would go in through the groin which made things a little uncomfortable for a few days but no big deal. Now they typically go through the wrist and it's like I said, less traumatic than a root canal.
Not a big deal, don't sweat it a bit