They are probably to make sure he's getting enough fluids etc. One of the tubes might be pain meds too, she speculates. All things considered Andy looked pretty good. He looked tired, but that's understandable. I bet he'll look even better when he's slept off the anaesthetic properly.
I think your speculations could be spot on TJ. He's probably suffering from a bit of post-op shock as well. All of which is why I'm glad he's being kept in for 2/3 days. Also it looks to me like he's in a private ward in an NHS hospital as opposed to being in a totally private one. Doesn't look luxurious enough to be one of those. So, as I said already, Bristol perhaps?