And that was with me resisting, because he was uninsured. We did a lot of planning though.
We worked out what each step would be and what alternate next steps would be if something went wrong (Can't get the incision to stay closed, can't get the magnet in, Steve passes out, I pass out, etc).
We talked through the plan dozens of times, so we both knew what each step was and were confident we were prepared.
We had all the materials we would need for each step laid out in easy reach.
We had an agreement ahead of time about when to seek medical help, both during the procedure, and during the healing.
My heart was still going triple speed, and I don't think I stopped worrying for days. My biggest fear was infection, since getting him antibiotics would be a pain.