Oh, he remembers. And he nearly makes the mistake of rolling his eyes at Anakin's comment on not being a doctor. Han certainly didn't need reminding of that particular fact, and he doesn't need to wonder anything at all about what Vader might have done with a more thorough biological understanding of those around him.

"Then get a healer." It seems simple, though he knows it most likely is anything but. "Because I've got a bad feeling either those things get removed or they get activated to do something a lot worse than be incoherent for a while. I'd rather take the option that hasn't got someone I don't like holding the remote."