"Doc, I'll get the smelling salts and slap you if I have to. Not the time for a mopey ramble, time for a brilliant one. Gotta assume she'll mostly hold to Time Lord biology, right? Which painkiller was it you're allergic to... If you see something pulled out that's a problem, better speak up."
He's used to that, too, hearing Owen talk out what he's doing, whether to himself or to the patient or to whoever might be listening. He watches the bustling about and steps out of the way; if his help was wanted with prepping for the IV, he'd get asked.