One of their best methods of keeping him in place is usually planting themselves right on him, so he’s stuck in place unless he wants to pluck them up. Another way is trying to coax him into staying there with great use of the puppy eyes both Sam and Jacob have, extra potent when they’re so tiny and innocent. Reminding him that they don’t have anyone else who can drive the Impala if he gets himself worse is another way that might help.
Or they can call up Bobby, who can threaten to tie Dean in place if he so much as thinks of moving.
Dean will gripe, bitch, moan and whine his way through the entire week.