As I write this, I am recovering from major surgery (hip replacement). I've had one other major surgery in my life, but I didn't stay overnight in a hospital for that one.
The thing I found fascinating about this event was the reliance on computer technology. Everything was barcoded -- me, my drugs, my IV fluids. All my pills came in wee tiny plastic bags with bar codes and they were scanned before being given to me. Whatever was injected into the IV line was wanded. Somewhere (and I'm sure I'll see it sometime soon) is an itemized list of what all those things cost.
Everything went fine and I'm working on the Recovery phase now. I hope to get back to writing in a day or two. For now, though, I'm taking advantage of the Invalid Phase and am lolling around the house and relaxing. I've jotted down some notes about my hospital visit to use in an upcoming book and am making notes about these crazy drugs I'm supposed to take. I can see a way to make that bar code thing work for me in a plot...